Why do a lot of you insist on using 'text' language on here?

Its frustrating and only makes your posts more difficult to read, it makes it look as if you cant spell. The English language is great, so many words to describe what we mean, this habit undermines your own intelligence or is it that education has 'dumbed down' so much a lot of you really cant spell? If you do have problems with spelling the site has a spellchecker, why don't you use it ?