Actually if its a GTI (FLOG IT). Any more ??I did mine, by heating each badge with a hair drier, don't need much heat for glue to soften and the whole badge and sticky stuff peels off in one go. Take care not to overdo the heat though!!, when badge moves from side to side thats when its ready to come off.
I quick rub with t cut got the remainder of the glue off.
When you time comes to sell your car you can put badges back on to read 'FLOG' 
Yes, you will have a recess where the badge sits.Ick so if I wanted to remove the VW I would have a big circle on the boot