So how are you going to enforce it? Break designated airspeed for a Lerk and you get bant? 
You think it isn't obvious who's doing it on purpose and constantly?
Nope. For example in pick-up games, it is now a banned action - sounds good in theory, no? But of course, inside a match the effects are aweful. Whenever someone goes Lerk, it ends in arguments wether it was 'vertical dodging' or 'pancaking' - they're essentially the same thing, but obviously people will argue that for some weird reason its fine when they do it. They'll for example say they "weren't spamming" or "weren't hitting the ground" - regardless of them still going at ~1000+ ish vertical speeds.
Just insert a rule or something that allows you to instantly kick anyone that goes Lerk until this is fixed, at least thats enforceable without needless drama.
