A security guard or guards on tent would put your prices up again. How they would know is each area wouldbe given a clearance for each team. I.E Team A is in section B. If you come to that area you last your card and mr security passes you. If you are taking kit from said area Mr Security checks your card again. Or you lock your bags and bar code them which has to match your pass for the day. So unless you leave kit around Mr Security can check your passes / barcode. If you see any players legging it across the bag field with a bag..... give chase !