Also, haven't seen anyone mention this yet, but the most famous K is Josef K, of the 'The Trial'. Presumably that's why you chose it. But... you're hoisting a flag of dark cynicism. Reading your blog post, you have seemingly initiated a self-fulfilling prophecy. Getting out of your Kafka-esque nightmare could indeed start with changing your surname, at least informally.
Not any more. The most famous K is from Men In Black now.