What can we do about crims?

Some young messed up people gathered in our local park, and damaged a picnic bench. Now the local council has removed the table, benches and concrete slab completely. No one can use it any more. Before it was used (besides by the reckless youngsters) by people sitting at the table for a picnic, people walking in the park with their pets used to stop and rest there, and by mothers with their young children playing. Why is it that a few irresponsible youngsters can ruin things for the rest of the local community. We objected to the authorities and were told it was removed because the youngsters were playing with homemade explosives. We have seen fires lid, but have had no confirmation from police about explosives. Well surely that is a matter for the police, but the local council used it as an excuse for no longer maintaining the park facilities. I do not like this trend in society that the destructive actions of a few low minded individuals becomes the standard influencing the rest of us and changing our decent, happy way of life in the community. What do you think? And what would you do about it?