They can be diverse: anything from specialized Moral Guardians or Principles Zealots to a bloodthirsty mob equipped with torches and pitchforks. Evil right down to their cold black hearts, which pump not blood like yours and mine, but rather a thick vomitous oil that oozes through their rotten veins and clots in their pea-sized brains, which becomes the cause of their Naziesque patterns of violent behaviour. The depiction of the character can go from being misunderstanding and delivering unwelcome advice all the way up to the extremes of bigotry or even physical violence in their efforts to 'help' or convert people into engaging in non-heterosexual activities.
So, here it is, all you beautiful trans* and GNC folks all over the globe.
A list of what we have a right to in the romance department.
This is a character who believes that non- actively heteronormative individuals are bad or 'unnatural' and thus must be unsatisfied, incomplete, or immoral.
Now you go outside and practice football like a good little heterosexual.
Obviously, queer people themselves can be as morally and satisfactorily ranging as heteronormative people.