No rule against it except in this case the rule of NPOV  Edit warring to force the inclusion of a biased word is crazy and Daves attempted justification is utterly utterly spurious  Anyway sorry for snapping at you up above Zhanzhao  when youre being attacked from all sides for trying to improve an article its easy to lash out indiscriminately  Borncycle if the reason given for the protection was edit warring that would be one thing  The claimed reason is persistent sockpuppetry and thats just dishonest