Rule of Creepy
The limit of the Willing Suspension of Disbelief for a given element is directly proportional to its creepiness.
Some tropes are often used for the purpose of making a character unlikable by making them come across as creepy. Many other tropes can also be shoehorned in for the job. Often, a plot element exist solely for the purpose of putting a giant red flag on a certain character: "Hey! This guy is creepy". Never mind whether or not the situation is psychologically, socially or even physically realistic. As long as it fills its function of highlighting the guy as creepy, disbelief will be willingly suspended
—or at least that's how it's intended. Parts of the audience may react differently.
While usually used against a single male character, it can also be used against female characters and against groups of people. Including entire races
Contrast Rule of Cool
and all the others
. Do not confuse with Rule of Scary
Some tropes that work well for this purpose (when played in a creepy way) are: