I've noticed we have bots copy pasting Reddit submissions. Is there a method to block them all?

I assume they mean good by 'generating' content in communities, but I don't see a reason why anyone would comment on them since the OP is on Reddit and will never read them.

I know I can block each individual account as I come across them but I'd just prefer to block them all so I don't see their content at all.

They appear to do the nice thing by adding a line in the submissions about it being an automated submission. Is there a filter for words/phrase found in the body of a submission?