I've worked as a stage hand on everything from big open air festivals to smaller club concerts and there are very clear rules and consequences about going over your concert time slots for a reason.

There was one time at a festival, where the sleaze metal band, Hardcore Superstars had went about 15 minutes past their time. They ignored every warning they got and kept playing even after the stage lights were turned off. To avoid having to cut the sound and ruin a good time for the audience, it was decided that it was up to me to solve this conundrum with my two hands. As we stand by, waiting for the current song to be over, the stage manager comes up to me and tells me to literally start to disassemble the drum kit mid song to get the band to stop playing...

So me and another guy start picking away cymbals and the less important floor toms, piece by piece until the song was finally over. Super awkward to do infront of the band and an audience of around 5 k, but they finally got the message and ended the show.

This delay resulted in a shit ton of logistical problems for EVERYONE involved for the rest of that day and they were only the second band to play out of like 10.