Z v T

fake a roach rush... now how can i benefit?

You don't

If you skimp econ to rush for roaches and don't do any significant damage to terran (killing workers, researching techlabs etc) then you're behind.

what i mean is show an early roach warren, cancel it, then how can you benefit by making him think a RR is on the way?

macro hard?

fast tech to mutas?

doesnt work against terran
few marauders in bunker behind wall plus repairs is enough
vs ffe toss you maybe force 2 more cannons at best
then theres the whole thing of having him scout that you actually are making a roach warren by doing ...........?

Also this means you open gas. So you're probably in a bad spot as is. Unless you plan to do some nonstandard mumbo jumbo

Take another fast base + throw off your opponent's timings.
IF it works.

Playing against extremely retarded people, it can work, yup.

It only works against people who understand what a roach rush can do...so quite the opposite. It's like canceling gas geysers after getting them scouted to throw your opponent off...roach warren costs 150 minerals so it's not a HUGE investment. Even if you let it finish, it's a queen.

also have to mine some gas + make extractors, try doing it. it'll mess up your timings

Why would you need to do this? So pointless.