I'm not easy to offend, so a NSFW mumm is not going to scare me away. If you want to scare me away, use grammar that makes my head hurt or use text speak! Seriously, how hard is it to read something before you hit the post button? Is typing Y-O-U that much harder than U? I don't expect everything to be written on the level of an English major, but if it's obvious that you just typed and hit submit, I will skip over it!
If I post a mumm and people want to get stupid in the comments, who cares! I know that the nature of the internet is that some people have nothing better to do than rip on others and they are so insecure in their real lives that sitting in the comfort of their own home behind a monitor and keyboard makes them feel big and bad. In a way, when I see crap like that, I feel sorry for the person because they obviously have nothing better to do than find people to rip on!
