When I saw this, my first instinct was to run the other direction as well. Then I read Rock Sandbourne's post (on the first page) and realized that he was right. The best way to build our community is to set a good example, be inclusive, and let others share in the fun.
A lot of, no most, people want to get immersed in the game and into their characters, truly. I think many people feel, however, that they need to be 'cool' because they think the rest of the people out there will see them as uncool if they immerse themselves. If we set an example and let people know that they are 'cool' if they get into character, too, then I think we will see more join us than not.
If you RP because you like it. If you get immersed because you like it. If you just prefer to stay in character because you like it. Then have confidence that others will like it too.