Would this collective group be surprised to know about a particular thing that you carry in your bag? Who has the most unusual item in their bag that they consider a necessity? For me it's my small zip lock full of Black Cat firecrackers, and yes, they are a necessity. The nicest court in my ultra hot and humid part of the world happens to be a public park because the tennis courts have been freshly remodeled and the courts reside within a stone's throw of the Atlantic, where the breeze makes the difference between being able to play and not even being able to leave the house. More frequently than you might imagine there are large groups of people that gather with their kids to celebrate children's birthdays or any such other activity where there are tons of children, most too young to be legally allowed to wander more than a few feet away from their parents. These picnic areas are about 50 yards from the courts so it generally isn't a problem. But because of the average caliber of modern day parents and their inability (or frankly the desire) to be decent parents and actually watch after their kids results in numerous occasions where platoons of these curtain-climbers make their way into the fenced court area, unobserved by their mothers and fathers. This isn't a problem in and of itself, and well behaved kids are great for holding balls and retrieving them when they get whacked the wrong way and it is an exercise they seem to enjoy. But many times we have a situation were the kids are incredibly unruly. Countless times I have had them run through during a volley or serve, some climbing on the very net that we are attempting to play over! Worse than all of this, the parents SIMPLY DO NOT CARE. I have asked the kids to get off the net, they don't listen. I've asked them not to travel through the playing area, they don't even acknowledge me. I have spoken to their parents, some (having only just discovered that little scooter junior has been 50 yards from picnic area) will yell for the kids to get back there, and usually if the kids listen, it is only temporary, as they find their way back, and the parents are oblivious. Some parents just reply that it is a public park and I have no right to restrict their kids from this beloved activity. It enrages me to no end. However, A single firecracker gets everyone's attention. Simply light it, wait for the pop, then look around like you have no idea where it came from. The parents decide that maybe this isn't the best place to allow kids to play and they leave, or at least they wrangle the little booger hookers up and make certain that they don't leave their site again. It works every time. I hate it that I have to resort to such things, but there really is no other option. You call the police out for that type of thing, you might see an officer about the time Halley's Comet enters our solar system again.