Might as well update the rules
Since there is tendency for banning for some different reasons, I think rules should be updated and be more accurate.
For example in my case, I (maybe) somehow posted an inappropriate link under my sig - but most of people doesn't know what's is "appropriate" or "inappropriate". Since my link (this link --> gh.ffshrine.org?r=33915 - lack of ten post makes me unable to put it's full form) had connection to anime and manga (and that tends to be topic on this forum) one might not find it inappropriate.
Basically speaking, using vague descriptions and then permanently banning accounts makes more confusion than it should.