Birth mom contacted me illegally?

She got hold of me over facebook. I don't want to have any contact with her and I've told her but she kept at it so I blocked her. She contacted some of my friends and I had them block her. I don't want to get anyone involved but I'm not sure what to do? I'm not sore with her or anything, I'm fine with the decision she made and am glad with the life I've got. I just don't see the need to drudge up what doesn't matter anymore. She gave me up when I was 4.