I also try to be professional, so not too close for comfort.
once upon a time I gave out business cards with my phone number on them.
that stopped when someone I THOUGHT was a writer started calling my place at any old time of the morning to fanboy out.
That was when I set my boundaries.
They haven't really changed. Be a professional at conventions, folks. It's all the difference in t he world.
I'll be polite, I'll even be friendly, but beyond that? Hard to say what will happen.
So, no fences. fences imply that I want to keep a certain distance. In public, at conventions, I believe in an open door policy. I look forward to meeting new friends and fans alike.