I believe Prestige 12 is a little overkill with its ability, but rather than that, I support this. (Personally, I don't think /suicide should be an accessible command anymore, mainly due to the fact that many "eggers" or "bowers" tend to spend their entire time as a zombie dying over and over again just to snipe or egg others. It kinda ruins the point of the game, in my opinion.)
If you see anyone using their prestige perk more than once (either by suicide or dying by a human), report them. As for the ranks, it wont happen. Nothing can be added, and yes, prest 8-10 are bugged and the bow doesn't spawn. That's a bug in the coding of the plugin.