The risk of homicidal domestic violence isn't the only thing a princess should worry about when marrying a guy she barely knows.
Seriously, I loved Frozen (I saw it in the theatre with my sisters and it was the perfect bonding movie for us). But I thought that Anna hooking up with Kristoff at the end kind of undercut the moral of the Hans plotline (ie marrying a guy you barely know is stupid and real romance is more complicated than a fairy tale). Plus, as nice as Kristoff is, I get the feeling that a dude who was raised in the woods by Trolls with ZERO concept of personal boundaries wouldn't be able to maintain a relationship with a princess who is used to sleeping in a palace and using proper indoor bathroom facilities. Just sayin'.
I still think the movie is great and a step in the right direction for Disney regarding how they handle female characters (even though I still have issues with how bland and identical the female designs are in their big-ticket CGI films). But the movie would have been perfect if only Kristoff and Anna had ended up as friends (or their romance had been only lightly implied at the end of the film instead of blatantly spelled out). Having Anna hook up with Kristoff after knowing him only a tiny bit longer than Hans makes her come across as kinda stupid.