I went to a trade show and sat down in a chair in a company's booth.
Then one of their marketing people started giving a demo. Right in front of MY chair! Don't they have any respect for their users? I was so mad I almost walked out!
Actually, not really.
Last time I went to a trade show I knew enough about how this stuff works to realize that the chairs in the booths are "free" because the company paid to have them there, to try to sell me stuff. I went to the booth anyway, but I didn't move in.
Bonus link: Instagram.