At least in Finland, the amateur radio regulations do not allow unattended operation without a specific automatic station license. This causes a problem that even when I would like to leave VarAC on overnight to gather up beacons and CQ's, I should not as there is a possibility that someone might call me and my station would be operating unattended, thus not by regulations.
If I turn off beacons and not call CQ, I am close to not making any noise about myself so nobody should be calling me either. Only if they just type my call on the connect window and try randomly :)
Bulletproof solution if of course to switch TX inhibit on on the radio..