Take the recent removal of adult-themed apps for instance - they in no way violated Apple's developer terms, but were banned anyways. Apple is well within their rights to do it - you're on their platform, but IMHO this sort of thing will encourage developer flight if it continues.
If history is any indication, the best cause of dissent and rebellion is inconsistent governance - people may tough it out if there's a 100%-effective way to keep the gestapo from raiding your home at night, but if you introduce enough uncertainty they will run and/or fight. By encouraging this sort of seemingly arbitrary banning, Apple is risking the long-term health of the App Store.