OK. so you don't believe in respect for private property (except, I have a sneaking suspicion, your own). Noted.
Is that the best you can do? That's a rather narrow focus, is it because you can't address anything else in the post above?
Note this, I've have a reputation for having pretty much anything someone might need during a protest, blank potsreboard, markers, tape, ty-wraps, scisssors, etc. People go through my bag all the time if I'm not there. It's the norm for the group, we work together. There's an expectation that it available for use, or why bring it. So your suspicions are wrong.
At CPAC, over the years numerous Freepers have had laptops running. People used them because it was in the booth and didn't explicitly ask prior permission. Why? The reasonable expectation is it's there for use. And the people who owned them didn't piss and moan.
Your reply is pretty clear you're absolute on the "me, mine" rather than the circumsttances or the norms. I am curious, roughly what age group do you fit into?