https://www.legalzoom.com/articles/fair-use-and-fair-dealing-in-social-media#:~:text=Social%20media%20and%20copyright,does%20the%20platform%20take%20ownership.

一般网页服务需要同意的条文里就已经包括了，例如twitter: https://twitter.com/en/tos

"If you believe that your Content has been copied in a way that constitutes copyright infringement, please report this by visiting our Copyright reporting form (https://help.twitter.com/forms/dmca) or contacting our designated copyright agent at:"

不过，一般没盈利和什么大范围影响的话，违反了也不会有什么大问题就是被管理员删了。

当然，因为各种原因，执法不到位/执法成本太高的地方很可能，那更加要用舆论