The lack of proper english.

[Stewart]

That's the whole point though; it’s about differentiating between genuine mistakes and laziness.

Everyone knows that a sentence starts with a capital letter, therefore, whenever you just write an entire post in lowercase, you are not making a genuine mistake, you are effectively saying 'I can't be bothered to type this properly, just read it as best you can.'

It’s lazy and arrogant. You expect people to read and respond to your message, but can't be bothered to spend an extra 1\4 of a second, to press Shift or Caps Lock, and start a sentence with a capital letter.

Exactly the same with text speak; how much time do you actually save by typing 'u' instead of 'you'? Not that much time really, is it, even for the less able typists? Add in the 'it makes you look like a complete fool' factor, and it can't be worth it, surly?

We are not 12 years old, hanging around outside a bus garage with our mates, composing 'l33t texts' to each other, so surly we can all start a sentence with a capital letter, end one with a full stop, and type 'you' instead of 'u'.

Am I being unreasonable?

[Allen]

No ur not... Sorry

I agree, I even text people in the proper way, just like I write all of my message here! The only time I don't type properly is using MSN or the like, but that's only coz I know the people I talk to. Even sometimes in MSN when I can be bothered, I type properly. I'm just being respectful I guess.

:edit: Oh, and I always check my messages about 3 times for spelling mistakes, coz I hate them to be wrong. Also, I use coz, lol, tbh, imho and brb very rarely when I can't be bothered to type out the whole thing.

[Howard]

I always text people in the same way I type on here. Only place I am a bit more lacklustre is MSN... I rarely use capitals on there.

[steve threlfall]

um, what is this "l33t" thing mean? I have no clue at all...

http://www.urbandictionary.com/define.php?term=l33t&f=1

Google leet speak- intresting article fom bbc on it