Not wanting to create a heated debate on spelling or grammar but what about the people who are dyslexic? are you not going to do look-ups if they spell a word wrong?.
Do roots-chat create another forum for people who type in abbreviations?
Text type should not make any difference to look-ups, yes it would be polite if we all used the correct grammatical procedures but not everyone talks like the upper-crust gentry of 18th century london, which is what our current ENGLISH is based on, we all have our own dialects and accents and with that comes with that regions peculiarities. Text type is just the modern equivelent of accents, only its spread across the country and not by region, and yes it is lazy and quick and thats why the younger generation like it.