I tried using the computer in the gift shop of our hotel to confirm our airline reservations, and gave up after 10 minutes. It was soooooo slowwwww (pop ups galore). I can't begin to imagine how many illicit programs are on that computer.
Also, when using a computer other than you own, make sure you delete the history of visited websites. When I went to delete mine, there must have been over 200 websites listed, including credit card companies, banks, etc. If I wasn't so honest, I could have reaped a fine harvest of personal information. I deleted all of them 'cause I'm a nice guy.