Of course, the number of stars does not equal the level of modelling skill or experience...that has never been suggested by anybody, and I seriously doubt that anybody thinks that.
I certainly don't think the stars are anything to get uptight about, either. Just a bit of fun!
The more fun you have here, the more you'll post, and the more stars you'll get.
As I said previously, the number beneath the stars should be a good enough indicator of a member's "experience" here in the forums, which is valuable information.
Have fun and post, folks! No sense in worrying about stars (or getting even more stars)!