I'm okay with posting them, too. But even when someone pm's them, I make the change to the picks document also, which is out here for everyone to see as an attachment. I've found most of the time there are sound reasons why folks pm their changes and picks.
When it gets to be time for the playoffs in a few weeks, pm'ing them becomes better for everyone since there are fewer competitors and gamesmanship against competitors becomes more important. If
I'm so fortunate to make the playoffs (so far that prospect looks good), I may need someone to be a picks collector to maintain impartiality in making my own picks!