I don't know what it's like now, since I haven't used POF since 2008 or so when I met my current girlfriend (though I only remembered to kill the account a few months back), but back then they would actually send you reminders every so often - I want to say once a week - that included your plain text password as a reminder.
I think this is just the kick in the ass I needed to go through all my accounts around the internet and make sure they all have unique, reasonably complex passwords. My email and banking passwords have always been unique, but I know I've been slack elsewhere. I won't let that happen again.