I've seen some people on Twitter say that they are going to delete their entire media library. My personal beliefs are that it will not work as the data and media uploaded will still have been on Twitter's servers and could still be sent off to feed AI.

The best and only ways we as artists have against AI is to poison any and all media uploaded to the web and made for clients. My advice for commissioned/gifted works would be to send both the original and poisoned work to whomever it was made for and ask that they only post the poisoned work online.