LOL Carol, I've done that too. A slight bump of the hip 'Oh MY, I'm so sorry, here I was just straightening up...'
They move.
At my last show, this past weekend, a guy & his wife, had folding chairs, like for a baseball game, that they plunked AT THE FRONT of the booth. one on each side, like guardians.
They barely sold anything and were sniffy about how much they had to pack back up. Now, I didn't do great, but better than they did. And even with 2 of them, I got packed up faster. Now, they take automobile parts and make them into clocks and such..so more delicate, maybe.
but they had a lot fewer items than I did to start with. But sitting where they were? I'd never have gone in, either, as I would have felt trapped.