Art scammer accounts in FanFiction.Net
Beware reviews and PM messages from users in FanFiction.Net describing themselves as artists who want to create artwork for your stories if you have any. These are nothing but scam bot accounts, and if you respond to any of them, this will trigger them to bombard you with additional spam. The only appropriate response to these accounts is to just block them. If you want artwork created for your stories, you ideally should be the one reaching out to people, not the other way around.
If you want a full list of accounts to block in advance, please check out the site's Fanfic Help Desk forum. A post containing the list is one of those pinned at the top of the forum. Be warned, for the post is constantly being updated due to the high amount of scam bot accounts flooding the site.