Basic Trope: The target of a Stalker with a Crush finds out about them and is flattered rather than horrified.
Straight: Lucy finds out that Richard has been spying on her for some time, taking pictures and yearning after her from afar. She finds this romantic rather than creepy.
Exaggerated: Lucy learns that Richard has been following her around, memorizing her schedule and keeping exhaustive records of her every move. Instead of barracading herself in the house and calling the police, she squeals with delight and embraces him.
Although while Lucy is flattered and even reciprocates his feelings, she still is worried that there might be something wrong with him.
The "stalking" is not really stalking: e.g. no spying or personal invasion is ever committed, the attention is not unwanted even if it's not reciprocated, it's Played for Laughs or pathetic rather than creepy, and it's more of an exaggerated case of Groupie Brigade than actual stalking.
Lucy has been isolated through out almost all of life. Years of isolation have made it so that she craves attention and socialization so much that to her being stalked is a good thing. Lucy has No Social Skills or any psychological or social knowledge, making her unaware of what kinds of people are stalkers and how inappropriate it is.
In the second downplayed version, because the behavior is innocuous, if slightly inappropriate where there isn't an existing relationship. It might worsen into "real" stalking, or it could just be the person's clumsy way of demonstrating affection and interest.
Inverted: Richard tries his best to avoid Lucy. When she finds out about this, she feels mega insecure, and seeks to make him love her.
It seems like Lucy finds Richards' actions romantic but it is later revealed that it was all a lie (out of fear that if she directly told him how she finds his actions revolting he would react rather violently.) Lucy approaches Richard and tells him how flattered she is but when he gets himself ready to date her she leaves and when she is further away from him she calls the police and have him arrested.
Lucy is flattered by Richard's utter "devotion" to her. But then Richard reveals that he is a Stalker Without A Crush trying to get some dirt on her or intimidate her. As a result, she either quickly realizes how creepy it was in the first place or is left heartbroken.
However Lucy had Richard arrested because she wanted to see just how serious of a stalker he is. When Richard breaks out of jail and tracks down Lucy, she is flattered.
Richard later falls in love with her and starts stalking her again. He also begins sneaking into her house and leaving around chocolates and jewelry for her as an apology. Lucy finds this sweet and they end up in a loving relationship.
Richard's devotion to stalking Lucy is incredibly creepy, but Lucy turns out to be a Nightmare Fetishist — which scares Richard off and reverses the entire situation, as she becomes his stalker.
Richard's stalking makes Lucy fall for him... but everyone else is insanely squicked out by this and respond accordingly.
Or alternatively, Lucy rejects or breaks up with Richard for stalking her and no one else sees what the big deal is.
People actually pay people to stalk them. * Bonus points if there are arguments against this practice under the reasoning that stalking should be done out of love not money! If so, cue the Does This Remind You of Anything? vibes.
Zig Zagged: Lucy responds favorably to Richard at first, but as she learns more about the depths of his obsession, she wavers between feeling flattered and feeling deeply disturbed. Her friends and family also respond in varying ways, ranging from "Aww! How romantic!" to "Oh God what?!" and "Hang on, Daddy just has to get his gun..".
Lucy is not being stalked at all.
Lucy is creeped out by Richard's inappropriate behavior and she files for a restraining order.
Lucy never finds out that Richard is stalking her.
Lampshaded: "So, instead of getting a restraining order, you sleep with him? Lucy, you need help".
Invoked: "When Lucy finds out I've been stalking her, she'll be so flattered, that she'll want me".
Exploited: It's well known in town that if you want a date with Lucy, you'd better get a hold of her schedule and some binoculars.
Defied: "I'll see your psycho ass in court!"
Discussed: "I would have called the cops myself, but apparently Lucy thinks Richard stalking her was really hot."
Lucy's positive reaction to him adds fuel to the fire; however, after becoming her boyfriend, Richard finds that Lucy is "changing" from the ideal image he'd constructed of her to something different. Something he doesn't like as much... The steps he takes to fix this mainly make matters worse, until the relationship comes to a painful, destructive end.
Lucy is delusional and paranoid, and only thinks Richard is stalking her. Richard just happens to ride the same bus as her and lives down the street from her but has no real interest in her at all.
Reconstructed: Despite his initial stalking attitude, Richard mellows out as his love for Lucy grows stronger and learns to trust her. Lucy, for her part, turns from a Fragile Flower to a confident, happy young woman and both end up Happily Married.