New age slang

There's been much debate whether or not slang is butchering the English language. Some think it's a negative development, while others feel that it is an enhancement.
How many times have you caught yourself writing "LOL", OMG!, wtf?!, ttyl, brb.. umm...ok that's all I can think of right now. CLEARLY I'm not "cool" enough to go on.... LOL....errr I mean..."hahha"

This whole phenomenon of the use of slang is essentially creating a new variety of language. Language is always always changing. There used to be a time where slang was only appropriate to use with your friends either in written or verbally form. Did you know that there are many university professors who are accepting and encouraging students to use slang in their academic work? It is not so uncommon to see abbreviations, acronym,and slang in academic papers.

Although I may not necessarily agree that we are ready as a society to accept this type of communication in business reports, formal emails, academic papers, etc... I do think that SOME slang enables people to better express themselves. For example: "LOL" means Laughing Out Loud. However, there is a time and a place to use it. Some may argue that the use of slang is due to pure laziness and a limited vocabulary. What do you think?

Also, The other day I spotted a few TTC transit media buys for the TD Summer Reading club with the Toronto Public Library. "LOL with the TD Summer Reading Club" was the campaign message.

What I find really interesting is that slang like "LOL" is being used in mainstream advertisements now. The campaign is targeted to children. In order to relate and capture engagement of the intended market it is absolutely necessary to be able to speak to them on their own level...and yes sometimes that means taking on a whole new language. These media buys were throughout the TTC so it is being exposed to a large mass audience including those that are not the intended target market. This means that others that have not yet caught on to the new era slang and the evolution of the English language are beginning to learn about it.

I wasn't able to take photos of the posters in the TTC subway trains but here is the website to the campaign: http://tdsrc.torontopubliclibrary.ca/


P.S.
Any guesses as to what these mean?
AAK
AFK
BMA
DIKU
EG
GMTA
HB
IMO