There was also a tendency to pop rockets into drainage pipes and other rigid tubing and have rocket fights down the street.
Generally the funding for these antics came from penny for the guy, nicking pop bottles and returning them for the deposit and saving dinner money up for a couple of weeks and finding a sympathetic newsagent who didn't mind selling fireworks to kids.
You could see kids getting slimmer because they were missing meals but it all worked out well because you had to be pretty quick on your feet in a home made rpg attack.