My personal thought is that I'd rather have it and not need it, than need it and not have it. However I don't have a lot of crap on my helmet. I have one door wedge and one flashlight in my band because I feel it is useful. I actually find the flashlight more useful on night time MVAs rather than fires. We are required to carry goggles but they sit on the back of my helmet and never get used. ( I like safety glasses better) As for stickers, I have a 9/11 10th anniversary sticker and a black helmet apparel sticker with the wording cut off.
I honestly couldn't care what people do and do not put in there helmets or there turn out gear. They'll put whatever they feel they need where ever they feel that they can easily get at it. My girlfriend and I jab each other back and forth on whats in our helmets but its all in good fun and none of it's serious.
I dont have a helmet band theres no need for one because i carry a flashlight on my jacket
i have 2 chocks and a flashlight on mine. not much at all
In my opinion, the less on your band the better. What do I know though, I don't even have a band. If I ever get around to getting one though, I will only get a light, chalks, and plugs. I'll keep sheers and everything else either hanging off my front or in my pockets.