Drakulie started a thread once where he pre-ran as many crosses as he could in a tennis racket. I don't think it saves any time at all and causes more wear and friction on the strings, but some like it. I don't think your badminton rackets is going to be any better.
Everyone has the right to be stupid... it's just that some people abuse the privilege...
Balance - 31.0 cm, Weight - 358 g, SW - 346 Kgcm^2