I think pinki gets the prize for the most open about their pin number.. in the world.. ever!!
I'm not paranoid at all, I just go with the flow, although when we were in Barcelona last year, I'd always make sure I stood on the side of my gf's bag and, holding her hand, I'd have my little finger over the top of the bag so's I'd feel if anything was going on.
When I lived there a Swedish friend of mine got mugged in El Born area (thin windy streets) and the mugger legged it, little did he know that 6ft Jenny was a marathon runner and quickly caught him, pinned him against the wall, got her bag back and an extra €5 off the mugger for the hassle!! Legendary!!