Keep the rule, those that have these urges don’t belong on this instance (or any for that matter).

The same goes for gore, snuff, brutal etc. content. It’s doesn’t have a place on such a well known instance as this.

Look more at it from this perspective: it’s illegal in many countries, don’t put the people who use/own this instance at legal risk. I see many posts from this instance on other (SFW) accounts, I would think that you wouldn’t want to draw legal attention or get defederated for a minority of questionable legal content.