sure, there is no set of comprehensive rules to deal with allsituations anywhere in the world. we get cases which we were not prepared for and have to deal with those. ranging from spammers, ppl posting links to extremist sites, porn, until dealing with those things is added to to written rules we have to take action regardless.
as they say you can make idiot proof rules and then a better idiot shows up.
As far as your other point
Aliyish is not banned.