I think there's a difference between protecting a page in which one is involved in an edit war and implementing a tempban when there is a clear violation of something as basic as the 3RR rule. The former is subjective, the latter is not and the effectiveness of the latter is diminished if there is a long lag time between the violation and the implementation of the tempban.

However, for purposes of transparency and accountability I think it would be a good idea to create a version of Wikipedia:Requests_for_page_protection for 3RR tempbans eg Wikipedia:Reqeusts_for_tempbans

Andy