Maybe, it is a dangerous gambit "onward Christian soldiers" ;)

Dear ISP,

We want all the terrible, sinful porno that will be on this new .xxx to be blocked from your service. We are a God fearing Christian family.

If you want to keep us as a customer offer a blocking service for this new disgusting .xxx domain. You could do this easy if not your competitor will ...

Mr. and Mrs. John Q. Public