I don’t think it can be stressed enough. Public computers (these are computers on which anyone other than yourself can access) are DANGEROUS. You should never use these computers to access any private information. This means you shouldn’t type in any passwords or sensitive information using these computers.
This is simply because you don’t know what’s been installed on them. Internet cafes, internet kiosks at hotels and airports and other public places often provide you with computers, but you won’t know if there are malicious software installed on them.
You just need to use one computer that is infected with Trojans and keyloggers, and your sensitive information will be collected and transmitted to criminals.
The lesson is: Only access sensitive and financial information using a computer you trust.