stars above youy name wot do they mean

The stars represent your Mylot rating.It's how your posts are perceived in Mylot.When you write quality posts ,you get (+) and if someone violates the Mylot guidelines they get (-).These add up to give your ratings.Whenever you respond to some discussions with a good post helping them ,you can expect a (+).Read the Mylot guidelines as well.They will help you understand how the rating works and contributes towards the star.