I'm recently engaged. My fiancee is receiving texts, messages on twitter and Facebook from past lovers. She hasn't set the record straight with them and told them not to contact her. So I'm really considering postponing the wedding. Am I being unreasonable?
Have you talked to her about it? Here's a crazy thing: there are people who think staying in touch with ex's is normal. They don't understand the slippery slope they're on.
I would suggest you have a sit-down with her. Explain to her that you are not comfortable with her contacts and you don't think it would be healthy or safe for you marriage for her to maintain them. See what she says. Maybe she'll immediately agree stop all contacts. If not, you've got a problem, and it's good to have it before the wedding as opposed to after.
Ideally, I think it is best to have no social networking. My H and I do not use FB - we shut our pages down. No twitter. No MySpace, etc. I'm on linkedin as part of my job, but I couldn't tell you the last time I was on there and H has my password. So it CAN be done.
Realistically, FB is the cultural norm now. H and I are oddballs because we
don't have a page. So if she has to be on FB, make it a page for
both of you, with both of you in the profile picture. Agree that you don't friend anyone unless she agrees, and vice versa.
Ask her if she will agree to this and see what she says. If she balks because she wants more 'privacy' tell her that privacy is what you have when you're using the restroom. It's 'secrecy' if she's sharing things with others that she doesn't want you to see. And that kind of secrecy is toxic to a marriage.