10. Use of English/SMS/AOL-Speak (source: Chris @
http://www.netstumbler.org/showthread.php?t=12814)
Make an attempt at proper grammar and spelling when you post. The meaning of your post is much more likely to come across as you intended and you will not look foolish (or if you do it will be for the content of your post, not the presentation ).
This isn't AIM, IRC, ICQ, SMS or any other real time chat application. In those type of services a person often needs to quickly get their response across otherwise it gets lost in the sea of other responses. It also helps a conversation flow to quickly get a response out. This forum isn't real time. You have the luxury of time to formulate a response and the ability to directly quote the person you are responding to in order to clarify the reason your response is relevant.
We are a community. Supposedly a community of intelligent people. This forum shows up on Google for certain technical queries. That means that people outside of our community will come here seeking knowledge from time to time. Do we want the impression they get of Remote Exploit to be juvenile punks with no basic communication skills? I don't want that.
Emotion is difficult to convey in the written word. It is even more difficult when you have to wade through a paragraph of ub3r 1337 h4x0r speak dat ur n07 int3re5ted in neway. Your post is much more likely to be misconstrued if you don't take the time to spell out what you mean and formulate a coherent thought.
Finally, it makes you look ignorant if you don't use proper grammar and spelling. It's as simple as that.