Well, reading the thread I can see why people might think that you are spamming.

In my opinion you should have made the first post to put you point across and then left it at that. The way the thread progresses, your answer to each post is to return with suggesting people should just use UBB which is going to get annoying.

If you make one post with valid comments that is constructive and informative, people will remember it for the right reasons. If you continue to try and brainwash people in to changing to UBB you're going to get a spam label which unfortunately is what has happened in this instance.