some of it is lack of education, but with the younger folks part of it is that they are used to IM which has its own set of shortcuts to save keystrokes, such as skool for school or sum1 for someone, and completely ignores punctuation.
Recently I worked on a project where the project manager would IM me work related stuff in that form. It took me longer to figure out her question than the amount of time she savesd on extra keystrokes, lol. (lol=laughing out loud).
an example – u dont hv any changes or anything lk tht rt (You don’t have any changes or anything like that, right?)
another: u cud do tht 2day or 2morow tho i ges (you could do that today or tomorrow though, I guess)