No Videos and GIF's in your signature unless under a spoiler. Picture in signature should not be bigger than 200 px in height. Total height of your signature should not exceed 15 lines of 15px text.
I think it just that people so rarely break the rules or when they do its not by a lot, so no one report people here. in old nuf. I recall on a thread people post one line replies and their sigs are about 5 or 6 times the height of one post because its some kitsune waifu pic. On a page of 10 replies its just the same picture over and like and endless scrolling for one sentence replies