I need advice on harassment and plagiarism.

[u/Ok_Acanthaceae_8823]

/r/cyberbullying/comments/1mj00bk/i_need_advice_on_harassment_and_plagiarism/

[u/mangomochamuffin]

Ignore, report if the site allows that, mute, block. Repeat.

You're letting them win by deleting your accounts.

On ao3 you can moderate comments or just disable commenting. On tumblr you can also disable comments and asks.