The thing is just that whorers will be whorers. Period. If not by xp whoring then by ramboing like hell and arty spamming. Even banning good players on servers so that only low skilled are left to get highest possible rate is something that they are doing atm. These servers should be perm be locked for rating. For the other servers, the ones where ppl can/want to rate, should just put their recharge time to normal. The more chargetime the more whore opportunity there is.
Even the chargetime loss by selfkill should be something that (non-whoring) servers should have turned on. Otherwise you will get the same as the ones do in our last 2 vids. I think it would be even a better idea to just turn off all server for rating and just let ppl sign themselfs (and server) up for rating. That this will be checked by TB staff and match the standards. This way raters know where to go and whoring can be minimized.