Just because there is more litter generated elsewhere does not mean steps shouldn't be taken to eliminate it where you can.
The balloons is a huge deal to any fan or area resident that looks to see "The Ballons" on race morning.
Heck man there is more trash thrown from cars along the roads and fence rows than any balloon release adds to.
But if that's how you feel then cool.
Do you just throw garbage out of your car window because others are? I'm betting no.