A lot of Bowen's defense starts with his feet. Everyone knows that. But if you look at the tape of any NBA game, you'll find several instances of what Bowen "did" to Francis. Just like was mentioned in this thread earlier, Francis did it to Manu in the same game.
Bowen is crafty as . "Dirty" just depends on your defini ion of dirty. To me, dirty is throwing elbows, undercutting players while they are in the air, etc.
Dirty players, to me, are guys like Karl Malone, Danny Fortson, Juwan Howard, etc.
Then there's a line of crafty, hard-nosed, tricky players that includes Bowen, Artest (except in his moments of psychotic behavior), etc.
Bowen will always be accused of stuff by some players because he rattles them.
Ray Allen accused Bowen of repeatedly "punching him in the stomach" during a game. Now if Ray Allen, All-Star/Superstar that he is, was actually getting repeatedly punched in the stomach in a game, the league would do something about it.