If you are writing the way a 12 year old child texts, I back out.
If you decide to come to MC, the most drama filled group on CM, to make threats of suicide, I back out.
If your post is long and I start detecting frequent grammatical mistakes like using the word "then" when it should be "than", I back out.
This is my short list. A good troll post will override any of the above.
Are there certain types of posts that you are a "snob" about?