Without getting invloved in the argument here, and yes I greatly dislike having to get out of the crew transport at 0430 AM and lug my crew suitcase through the X-ray machine at LHR as well, I do want to state here that going through that checkpoint twice a month, I always find the security people there both friendly and courteous.
They did not make these silly rules, they enforce them, in in my experience a bit of courtesy from the crew goes a long way in smoothing thise whole silly procedure.