On Infection, when you want XP...other players get in the middle of you and take it. I think they should add something so people won't steal your XP!
Maybe if the EXP was disguised as a foodtype. no-one would know about it and it would be collected automatically when you have killed someone.
I agree, instantly attributing the XP would prevent what is essentially kill-stealing (in a way, think about it). Though, that requires a tweak to the plugin, and since Infection has remained the same as it was forever and a day ago, I don't think a change is imminent.