Some helpful advice, in case you run into a spammer in the comments

https://imgflip.com/terms

Heading 2: Spam
Do not spam. Spamming includes POSTING LINKS EXCLUSIVELY TO YOUR OWN CONTENT or monetization, posting malware links, posting irrelevant content, posting lengthy or irrelevant "copypastas", and anything else that is clearly a detriment to the Imgflip community.

I'm glad you said something, though. It seems like there have been more people than usual putting links to their own stuff on other people's memes.

Thanks! I'd just thought that someone needed to speak up on the subject, instead of complaining in the comments section. Hopefully this will get more light shined on it.

It sounds a little over the top (I thought flagging comments was for the really nasty ones), but maybe it is a good idea. It would probably discourage spammers more.