No, I don't in the least think you are being overly cautious or paranoid. I'd NEVER give out details which could lead back to me in the event of AW's website being hacked.
Now, as an elderly punter, I know a little about women, but nothing about IT; however, for the computer literate hotshots who think I'm too untrusting, I have two words of warning. The first is 'Ashley' and the second is 'Madison'.