I love how people think there are actually sufficient gains to be made by a bowler "chucking". Yes it may not be the most elegant thing to see a bowler do but I think I can safely say if the ICC said you can bowl however you want and bowlers can chuck I don't think we'd see wickets tumbling left right and centre. Does chucking make you bowl faster? No. Does it make you swing/seam a ball more? No. Go try it and see what you can do by chucking!
I agree that you probably do straighten your arm more, hence increase the chances of "chucking" when bowling a doosra but surely the doosra has added much to the game and should be celebrated? It takes skill to bowl it and even more to land it with as much accuracy as Murali/Ajmal do.
People need to accept it and get on with their lives!!!!