Most sailors are proud of their boats... if you're not...maybe you need a different boat. I wouldn't sail on a boat I would call what you're planning to name your boat.
But, it is your boat, and your choice to live with whatever you call it.
IMHO, it is a bit petty to call it "Filthy Whore" and then say it is named for your ex-wife. At some point, you saw enough in her to marry her, you might want to respect that part of whatever relationship you had.
Seriously? I happen to think "Filthy Whore" is a great name. Not every boat needs to be named something that wouldn't offend your grandmother and not every sailor needs to wear a blue blazer and topsiders. And who are you to preach to this guy about whether or not he should respect his ex-wife? Jeezus, who made you the arbiter of relationships and proper boat names?