These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Acceptable Ethnic Targets: The majority of predators busted are white men, many of whom are middle class or above. This is in sharp contrast to other reality crime based shows where the majority seems skewed towards low income minorities.
Average income did notably fall though as the show became well known, which was speculated to be because of Genre Savvy among the more educated.
And that "attractive young actress" who greets them by the door: make no mistake, she's hot. And at 18, she's US legal. Presumably someone at To Catch A Predator HQ sat down with a bunch of audition tapes and spooled through it, trying to find a sexy 18-year-old who could pass for 13. They'll have stared at girl after girl, umming and ahhing over their chest sizes, until they found just the right one. And like I say, she's hot. But if you fancy her, you're a paedophile.
Internet Backdraft, Broken Base: Although these tropes likely existed as early as the whole "exploding GM cars" thing, they didn't really kick off until the whole "To Catch a Predator" bit got started.
Just Here For To Catch A Predator: Alright, this show has been running in some form for at least 20 years. TCAP lasted as a few standalone segments for 4 years. Now look at how many tropes cover just that segment...
Unintentionally Sympathetic: This is constantly discussed in Dateline, as you will see the predators in a sympathetic light. They may be very genuine. However, Chris Hansen, or the narrator, will remind themselves AND the audience that these are the same men who were soliciting sex from a minor who clearly had perverted intentions in mind (and that is at best. Some had much worse intentions).
The saddest part is that there are some genuinely nice guys who talk to them, which would normally earn our sympathy. Until we are reminded, or we learn from factual evidence as to how intent they are as a predator, shattering any sympathy for them.
On the other hand, the questionable ethics surrouding entrapment led Charlie Brooker to claim that it made him feel sorry for the child rapists.