With modern 802.3 spec compliant PoE: I don't worry about it. At least with all the switches I've used. Never ever had it send power to some device that wasn't

With modern 802.3 spec compliant PoE: I don't worry about it. At least with all the switches I've used. Never ever had it send power to some device that wasn't expecting it. This is a bit analogous to USB-C PD power supplies, which can supply 12V/24V, but only do this when devices ask for it. I don't worry that my laptop's USB-C power supply will go rogue and send 24V to my earbuds.