Hi, really annoying and distracting. Pictures are bad enough especially when people feel the need to put large ones in their signature...but gifs are just annoying I have to block multiple people already because they have huge gifs in their signature and reading the forum with these moving stuff is not fun.
Click on your name in the top right of the page (next to the message icon). Select preferences, then near the bottom you'll find the option to "Show people's signatures with their messages". Deselect this and all should be good.
Blocking signatures from showing is the single best thing you can do to improve your quality of life on the forum.