RAWR! And out come the claws! (You, not her.)

Definitely stay away from this girl. Its good that you've blocked her. In terms of your reputation, rise above. Don't get involved with any of her antics. Hold your head high and be the most respectable person you can be.

Honestly, she does sound very childish. Yeah, you met with a guy in a completely platonic/professional way and OMG, now you're stealing her boyfriend! Craziness.

As for your reputation.....don't worry about her trashing you. Everyone will eventually find out what kind of drama queen she is. They'll respect you more for taking the high road.