Likewise, especially since "competitive" is such a huge range. As an example, if I'm currently making $100k, I might entertain a position at a slightly interesting company that's offering a "competitive" salary of $95k. However, I don't think there's anything that would make me go through the hassle of interviewing for a job paying a "competitive" $60k.

Basically, posting the salary range gives me a quick and easy way to weed out those companies which aren't serious without a significant investment of my time.