I'm merely giving you a suggestion that will not be at all difficult for you to enforce, and it will make people take you just a little more seriously if you go to the effort of spelling properly. There's no rule against having fun on the forum, but there's also no good reason to not spell properly when the way you write is key to the message you want to relay.
Another thing I'm getting at is if you ever want to try and say something meaningful or deep, but people know you for all your one-liner semi-spam posts, they're simply not going to take you seriously.
You being able to properly write and express your ideas is something good, and it improves your ability to discuss fluently.
As a staff member, it's my duty to keep these forums in high-quality, even if it means little things like telling people to resize their signatures or to maybe go to the effort of spelling a little better.