Drums kill the atmosphere.
Whenever away support bring drums to the Etihad the home support simply shuts up as they can't get a word in edgeways due to the constant repetitive drone of the thing. Even the away support doesn't string any meaningful songs together. The same happens at away grounds when Blues often only sing once the drumming stops.
Leave these gimmicks to foreign clubs who don't know any better and lower league clubs who should know better.
My view is that City should ban all instruments from the Etihad "on health and safety grounds" ;-) for both home and away supporters, if I wanted to bring a box the size of a drum into the stadium and keep it in my seat area I would be refused citing health and safety (and insanity) reasons, should be the same for drums.
Now stop it off and let that be the end of it we are better than that.