This exchange reminds us of so many blog posts and comment threads that we can all relate. I can think of a couple right here at Neatorama that fit this diagram perfectly. The same thing happens at thousands of websites every day. Leave it to Doghouse Diaries to frame a noticeable trend so succinctly.
1. cliche
2. sarcasm
3. lighten up
4. over their heads
5. freedom of speech
6. meta
Of course, you could add 7. fringe rant (in all caps), 8. Godwin, 9. name-calling, and of course 10. typo/grammar, but that wouldn't flow so well and would make for an unnecessarily long comic.
I win.
"a unnecessarily"
You did that just for me!
Thanks so much.