Actually, I was just in this situation in December. BLACK OUT all information not pertaining to you... your wife's social,her b-day,her kids/your kids not by ex #1- full names, b-dates, socials, etc. your wife's W-2 Info, etc.
Soc told me that it would be courteous to ask the other parties attorney if it would be acceptable to them. I didn't ask because, like someone above's situation- the people I am dealing with HAVE stolen others information and her new husband has been busted for forgery, stealing, and numerous other crimes and I blacked it out anyways. What was she going to say? "I need your wife's and your wife's children's social security information" ?? Explain to me why it's relevant!
If you don't black it out and it goes to court, you can OBJECT to the document being shown in it's entirety(sp) with the IRRELEVANT(sp) information legible and ask the judge to blacken the info out (problem is, they may just possibly run a pen mark through it, still leaving it visible).