After being here for 1 year and having read varied posts from posters on this thread over the course of the year, I don't think anyone can throw rocks at glass houses regarding sarcastic comments.
No one is throwing rocks. Just pointing out that if the majority of one's posts on a particular subject are sarcastic, one should be not be surprised when one's sincerity is questioned on the odd non sarcastic post.
Can honestly say I don't live I glass house when it comes to that.