said by planet:question 1. Do you use your pc for banking purposes?
Yes, though mostly for reviewing the account and for scheduling bill payments.
said by planet:question 2. Do banking employees access accounts with potentially insecure computers?
Probably. I have no control over that. As far as I know, most banks try to follow strict security policies, but I presume that they sometimes fail.
said by planet:question 3. If you use a debit card for ATM purposes only, no use other than an ATM, how likely could it be compromised?
I do that, and have not had a problem.
However, I only use the bank ATMs in a secure location. The most likely risk is a camera recording as you enter your PIN, so it's best to be cautious about where you use it.