I think this is actually a good idea, and it's something I've thought of in the past.

I agree some of the warcrys we're seeing are pretty lame, but I don't think it's cool to use that as your criteria for shutting this idea down. I think warcry comes in at about level 18 or so. (Low level, whatever.) Just about any newbie who can read can get a warrior to level eighteen. This could certainly account for some of your lame warcrys out there. Contrastly, getting an AP to level 36 is not an easy task, and generating fifty charges takes skill and experience. I think that the level of experience a weapon of this magnitute warrants indicates a more responsible player than your lame-warcrying 18th level warrior. <--- Run on sentence. I think that a player at this ability level is far less likely to name his axe something retarded. Furthermore, AP's get rather paranoid about loosing there unholy weapon, and probably would not risk loosing it to an imm over a name like "Turd Stick."

I say give it a go, it would add a great dynamic to the class.