Common guys! Let us stop this usage.

I am no grammar Nazi, and quite often pick up and use neologisms. But one common mistake I'd very much like to see the back of is the usage of the word "common" to mean "come on". I see this more often than not in "chats" and in SMS. It is not uncommon for someone to say something like - "common man, it's not that far" - leaving me confused. Eventually it dawns on me that "common" must be read as "come on" and then it makes sense.

In the end, my humble plea is - "common guys, let us stop this usage".