I'd take a guess and say that an oldschooler would go with All But Last rather than Kill The Leader, hence misunderstandings and kicks
http://worms2d.info/Rulesyeah the rules have changed, quite possibly to the worse
btw, if you go to a random shopper game and say "caa" (CBA AFR ABL) instead of "cak", there's a chance that the host would assume that as a typo and not kick you, creating a situation where one player plays by one set of rules and the other players having another set of rules
have fun trolling them