There should be concern, and not about the spelling or vocabulary usage. SMS and other "mutilations" of English are a sign of an inability to cope with situations. SMS for example, is a hurried form of communicating. It glosses over depth of thought to create something that's quick yet superficial. For texting that's probably adequate. But more people are using SMS as their only means of communicating. The same can be said with spelling errors. People are spelling words as they pronounce them like confusing "then" and "than." Then there's my favorite: it's. That is a contraction for "it is" and nothing else. Another one is tense. Plural and singular tense are used interchangably because people don't know the difference. What's worse is that kids graduating from high school cannot spell, refuse to use a dictionary, and cannot function in a job market. Our society has become too hurried and complex -- some might say too diverse -- for people to care about using a language correctly. We've also become too reliant on technology and have become mentally lazy. That's why we are losing our Constitutional rights. We want to be taken care of as would a child by an adult. We're evolving to where we don't need individual rights when we have a government to dictate how we should live. So SMS leads to a society of mindless robots. And that should be cause for concern.