@bob I do not think any less of people that use proprietary software.  Most of them do not realize the choice they have available, or are made to believe by corporate propoganda that Linux is some hard, unfathomable thing that requires deep technical knowledge and CLIs.  This is a false belief, and most people are more than happy to use free software alternatives that provide all the tools they need.  But you'll attract much better responses to this if you're diplomatic rather than dogmatic.  Speaking down to people only makes them resistant to what you're saying, not receptive.