I did this [1], and so have thousands of others through the Harvard Personal Genome Project and other associated projects. So far, I haven't faced any consequences. If you decide to do so, I encourage you to make your genes accessible to researchers by participating in the Harvard Personal Genome Project [2].

The main risk of sharing your genes is genetic discrimination. It's irreversible to share your genes, so I'd ask yourself: if you were to find out you are a carrier of a genetic disorder, would that change your mind? If so, I wouldn't share your genes publically.

[1] http://genes.howderek.com/ [2] http://personalgenomes.org/