I have, both to a mate for a recording session that I wasn’t go to be at, and to a headliner who sadly knackered his bass in at the gig, it fell over with the lead plugged in and damaged the jack socket.
In the circumstances of the OP the answer would be no, don’t know the guy, don’t know the facilities at the gig, don’t know the other bands, too many variables where damage/theft could take place.