I do. And I haven't used gmail over wifi in months. A few weeks ago, I got kicked out of gmail, with a note that "unusual activity" had taken place, and my account was suspended. Some IP address in Brazil had tried sending out some spam through my account (all of which Google blocked). I've never been further south than Costa Rica. My PW was a mix of letters and numbers. Linux at work, OS X at home, both behind firewalls.