There is no program isolation in Xorg so any program can contain a keylogger and read the keystrokes you input in other programs. What do you do about this?

Personally I close apps. If my understanding is correct, a program needs to have a window before it can have a functional keylogger, so minimizing programs to the systray also suffices. Please correct me if I'm wrong. But that's what I do.

Here's a poll for people who are into polls.