yeah that's my only worry with them i suppose, but i've only experienced it a little bit so it's not been too bad luckily!

on TH i just fave characters i like and don't have any separate folders for them, on dA though since i fave both characters and art i have a folder called 'amazing designs' just for easier sorting purposes but it's in no way a wishlist/dreamies folder, like others have mentioned in other comments it's mainly just to look back on and see my kind of design aesthetic/designs i lean towards for reference?
but yes i'd never harass anyone or bug them about the designs as they all have good homes ~