Ana,
You asked me how to "stay emotionally detached." I don't always do that. Sometimes, I get furious, but I try to calm down before I post, so as to attack the idea, not the poster. As Abaddon pointed out, it somewhat depends on the statements of the poster. Sometimes, I will go after the person, as OUTLAW, can well attest, as he has commented after I got on someone's case.
I guess we all have our hot buttons. One of mine is a JW or fundie who comes here to condesceningly tell us poor ignorant ones how it is. That really gets my juices flowing.
Now, if someone attacks me, it usually doesn't bother me, because I know in my heart, they are full of shit, hee hee. There were two posters here that I respect who were mad at me. I sent them private emails, and we got things worked out, and we get along fine now.
For shy ones, I would recommend D. Whiltshire's advice. Just jump in with your opinion now and then. It won't hurt. The worst thing that can happen is that you will get blasted, but it won't really ruin you. Surprisingly, you may find others who share your divergent view.
Now, my wife is one of those shy posters. Sometimes, she will read something and agree with a contraversial point of view. I encourage her to voice her agreement. Sometimes she does; sometimes she doesn't.
Julie, on your first post, you said you were shy. Was that tongue in cheek humour? You strike me as a direct, articulate poster. You don't come across as shy. Just curious.