White Dove, I'm glad you brought this up. I hate being touched without permission, which my children know very well. They grin when they see some well-meaning "sister" approaching me with her bear paws stretched wide. I get touched a lot at the Kingdom Hall, too, which I interpret as some sort of talisman. Like their superficial intimacy will charm me in to submission or something. I hate it.
At the Kingdom Hall, I take my time sitting down, so I can back up quickly if someone invades my personal space, just as you did. The SECOND attempt would get a verbal warning.
This has had limited success. I've told an aggressive toucher at my church that I don't want to be hugged. She has taken this as a challenge and goes out of her way to poke me or slap me on the arm. (wince)
http://www.youtube.com/watch?v=eTQY1Aw9zcs
Don't get me wrong, I like to hug...with meaning. None of this random acts of touching stuff.