just make it uniformed across every form - whether running crystals, DSM, Synths, Nomadio, Nimble's thing (which you did a nice shameless plug for your product all thru this thread)
Treat them all the same...if you impound one, impound them all...if not, your staff will be dealing with nothing be headaches having to answer the same questions over and over again "why can that dude keep his radio and I can't?" or you'll have the jerks that just dont care and keep theirs in the pits too...
make it uniformed for everyone, its just easier!!