There are quite a great amount of very good actors who have taken on crappy movies.. Jeremy Irons in Dungeons & Dragons, Ben Kingsley in Uwe Boll movies! etc..
I liked the D&D movie.
And Bay vs Fox - well, of course she's right, but despite everything else, Bay is extremely successful, and imo Fox should be a little more careful with what she says until she's had even half of his success.
It's not like she's a critically acclaimed theatre actress or anything either...
eta:I just looked at Michael Bay's wikipedia page and at the moment it looks like this:
the photo that assumingly shows "Michael Bay in 2008" is titled "vaginal bulb syringe.jpg"

God bless Wikipedia.