It'd be cool if clicking while not using tools on a fake-killed brick picked it up, but only client-side and floating in front of you. (No actual effect to the server or gameplay to anyone else except those whose physics simulation vaguely matches yours and see the brick in the same place - it just starts floating in front of them to be dropped if you click again or if it respawns)
It wouldn't need much synchronisation, just "Space Guy is clicking here" which is pretty much already transmitted for firing guns/clicking brick buttons anyway and then the client-side physics handles it.