She just murdered three men. Why isn’t she in trouble
Because she’s not a real person.
Gotham doesn’t exist.
The hyperbolic actions such as those taken by Harley and Ivy (I’m very close to them I can use their first names), is often used for comic enjoyment and in this case the allegory that if you demean women with cat calls and wolf whistles eventually you will get your shit fucked up by super villains.
Okay, so not so much an allegory as a warning.
(I totally know what an allegory is, but I ended up thinking the super villains point was better than just, you know, stop it, harassing women like that is morally reprehensible)