ok...
I used to do dumbell shrugs like so...
I don't exactly roll... but I concentrate on lifting in front, and then alternate by lifting more towards the back... (this is hard to explain)
so it's not a roll... but it's one rep holding the dumbells back further, and one rep holding them more towards the front....
Is this also bad? worthless?
I only did it to try to work all the traps... for some reason I have a hard time working the middle of my traps, below the back of my neck... (this method didn't work either!)