I haven't noticed much incivility, at least nothing like I've experienced elsewhere.

There may be an increase in evangelism lately, which can be annoying. Religeous zeal tends to be extreme and generally inflexible and this can appear to lack civility.

Also annoying, especially when combined with evangelism, is when people post in the "nit-pic" method where they quote and refute what you said sentence-by-sentence. I find that annoying and don't like to read those types of posts.

And nobody likes ad hominem attacks or any comments about your mother.

Maybe you can post a vague example of what you mean?