It's hard to read with old eyes XP
.. Or even young ones! Either way, it's just plain... I dunno. I quickly lose my respect for someone who can't just type two extra letters to say "you". "@" is harder to type than "at", personally :P
Just because someone's not forcing me to read a post dosen't mean I don't want to read it!
I guess it's just a personal preference. But I really and truly think that we are creatures of habit; once one starts typing incorrectely, one will start writing like that and eventually talking. Practice makes permanent ;)