true, which answers the "when not" for 75%

More often than not   5/2%
Occasionally         21/7%
Never                48/16%
What is taint mode? 219/75%
[download]

But ...

> And 2/3 of the rest also use it.

I think you misread the 16%.

So (almost) 2/3 of the rest is NOT using it.

edit

Anyway I don't think this is a good poll anyway.

There was no option for "always"

And if someone is not writing code dealing with untrusted input he'll rightfully say never.

Not all of us are web-devs, a decent survey would break that down on usage patterns.

FWIW: PM-Polls are mostly for fun, not information ...