we ran a drugs amnesty / donations bucket when stewarding a back of beyond back stage camping gate one year. What happened to them was that we shared them out equally among all the stewards on the gates, but we still never let anyone pass though who shouldn't have. Great method of stopping people being idiots trying to get through the gate, just get them to sit down and skin up, then 20 minutes later they kinda realise they're wasting their night, and stumble off back in the opposite direction.
We also used to catch fence jumpers then really confuse them by kicking them out of the back stage camping into the festival.
tbf the festival had given us radios that didn't actually have a channel on them to allow us to communicate with security, and given what was going on in the camping area, we kinda saw it as part of our job not to be bringing security in to that area if it could possibly be avoided.
I suspect times may have changed a little.