And who ot what would prevent the perp from carrying a cardboard box (with gift wrapping and ribbons, if it catches their fancy) in a mesh bag? One could even set up the bomb detonation by jerking the gift ribbon knot untied, like a grenade pin. One would need to demand see-through property on everything the potential perp carries or is wearing. Otherwise it makes sense.
Generally it would be forbidden. Sorry, if you want to play Sanata Claus, take a taxi.