I'm glad to say that when I went to gigs (circa 1864) this was not a thing. The worst you could expect would be some arsehole with a (titter) hand-held recorder like the one below, or maybe a recording walkman, shushing you as he was trying to record the show on the sly.
BOOTLEG, BABY!
Of course, the real pros managed to blag a spot up at the mixing desk. Now
those bootlegs were sweet!