Um, a couple notes here:

1. People sometimes find comments using ALL CAPS for emphasis unpleasant to read. I think that you may be annoying people with this behavior -- I wanted to let you know in case this wasn't your intention.

2. I think that upvoting simple "Thanks" comments is sometimes beneficial -- courtesy can be helpful in maintaining useful dialogue between people who have very different beliefs prior to the discussion.

ETA: Yes, I will downvote such comments if they get too much karma -- my note above mostly extends to a point or two.