Personally, if the entry fee included a voucher for pie/pint, burger/soft-drink deal, then I would consider it as I am going to buy that in the ground anyway. Would resolve the issue of people going in there to get warm/dry or somewhere to eat packed lunch, but not actually buy anything, but...
Went to The Swan with my son on Saturday to try and watch the Manc derby, couldn't see the screen so gave up. Arrived at the ground around 1.10, couldn't go on the concourse as it didn't open till 1.30, couldn't go in Dick's as my son is under 18 and I wasn't going to pay £24 to use the Seven...