I imagine 99% of keyloggers are the 'put this on as many machines as possible and look for worthwhile logins' type, which are well-thwarted by this approach. A

I imagine 99% of keyloggers are the 'put this on as many machines as possible and look for worthwhile logins' type, which are well-thwarted by this approach. Anything more bespoke than that is probably much rarer.