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 Dave1185's attempted justification is utterly, utterly spurious.  Anyway, sorry for snapping at you up above, Zhanzhao - when you're being attacked from all sides for trying to improve an article it's easy to lash out indiscriminately.  Born2cycle, if the reason given for the protection was edit warring that would be one thing.  The claimed reason is "persistent sockpuppetry" and that's just dishonest.  2.220.204.70