Hmmmm-I don’t see why having a MySpace account would affect custody unless you had child porno or some other concerning issues associated with that account. Personally, I would make the account locked so that only people YOU accept can view your page. People get ansy about putting childrens’ pictures online, but if you block your account to only ‘friends’ then I don’t see the photos being an issue. If he still gripes, then just take them off the MySpace account. You can email a photo if you wish to a friend who wants to see them.
What you do on your own time is your own business and none of his concern unless it negatively affects your children-which I don’t see it doing…unless you spend all your time online while children are in your care-thus neglecting them. But it doesn’t sound like that is the case.
If you have custody now,and it’s in a signed agreement or court order, then he will have to show just cause for that custody to change. ‘mitigating circumstances’.