Driving Me Crazy

Everyone knows what it's like to deal with horrible drivers.  Of all the bad habits drivers have, there is one that just drives me crazy.  If there is no specific right turning lane, and it's shared with the traveling lane, pretty sure you shouldn't slam on your brakes...  then turn...  If it's a green light, you can keep going pretty fast.  You don't have the take the turn going 60 mph, but you don't need to come to a screeching halt and take it going 5 mph.  That seriously happened to me the other day.  So is it a smart idea to stop to turn when it's a green light and there are cars going 50 mph following you?  Yeeaahh... no [: