I don't think most venues care if you stealth (at least the venues I go to).
Security only cares about something that might cost the venue money or getting them into trouble, which would include: bringing your own booze into the venue, drugs, getting in a fight...
You could argue that they could get into trouble with a band if the contract states "no taping" and the venue security is responsible for looking out for such activity...but even then I think it's a pretty low priority for the venue.
The only thing that really worries me is the "power trip" security dude.
All that being said...it's not rocket science. I don't do anything that someone with an IQ over about 80 couldn't figure out on their own. Be smart, and don't worry about what is said here. We are a low priority.