i always thought it wasnt the bottle tops clubs are so worried about being thrown, its the full bottles-by the time a bottle top is thrown and reaches any player on the pitch its not going to hurt anyone-its the full bottle smashing into a players face-as at a game last weekend could. Without a...
it doesn't stop it being thrown, but with no cap it will very quickly empty and be less of a potential threat. Distance will be reduced substantially and when/if it hits its target it will do less potential harm
There is also the likelihood of someone in the crowd taking offence as the bottle...