Oh, well … there are differences between "broken" and "broken". Some messages are so painful that it takes a bunch of imagination to even try to understand what they are talking about. Especially in coding forums, as they often confused details / jargon. However, the OP in this thread is not even close to the worst that I've seen on this forum, and should get away with it without a hitch.
As for tastes, as others have said, contribute. Post replies, participate in discussions, try to post funny comments or topics, and so on. It's really not so difficult if you have knowledge that might be useful to others. However, if you publish one-liners, useless comments and more, you will probably have less taste. If people recognize that you have done this, they will be less inclined to give you a taste even when you contribute.