The policy is this:
Hi, thanks, signatures and taglines are discouraged in all posts.
If an editor sees these, and is willing to fix the other problems in the post (spelling, grammar, etc.), they are free to remove said taglines, signatures, etc.
Think of your question (and it's answers) as a mini blog post. Would you put "Thanks in Advance" in one of your own blog posts? No, you wouldn't.
We want to keep all posts on Stack Overflow as noise-free as possible. Saying "thanks" is nice, but upvoting is better. Putting your name in your post is redundant; your user card displays your name on every post you make.
Anyway, to address the linked post, the words that were removed by the editor didn't really add anything to your question. If you're really interested in social lubrication, one of the best things you can do on Stack Overflow is to get to the point, as quickly as possible.