Just to illustrate the general idiocy of stewards' "potential weapons" policies, at an Ireland match a couple of years ago, having stored my drum in the portacabin beforehand with all the rest of the eL fans' stuff, I collected it and went round to the turnstiles:
Steward - "You can't bring those drumsticks in"
Me - "Why not?"
Steward - "They could be used as weapons"
Me - "But I can bring the drum in?"
Steward - "Of course"
Me - "And I play it how? Headbutt it?"
I just went to the next turnstile, where the steward had a functioning brain.
Adam, I know what you're saying about anything to hand becoming a potential weapon / missile in the heat of the moment, but in that case they'd be confiscating mobile phones, zippo lighters, keys, the works.