We free software advocates surely know that, no matter what we say or how we say it, some people have to or (if you prefer) simply want to use proprietary software for one reason or another - and that's even when they've heard and understood everything we have to say on the matter. Many free software advocates, though, only preach abstinence from - and a zero tolerance policy towards - proprietary software. I have to disagree with this approach. Let me explain...