Don't ask me for money

I have, and still do donate to charities. I go to fund raisers of all kinds, play in charity golf outings and give in other ways when I can. A common sight at the food store I go to these days are kids with coffee cans asking for money for all kinds of activities. Baseball, football, cheerleading, Odyssey of the Mind (what is that??) and others.
While I know they need money for the activities, I am sure there other ways for them to raise needed money other than to stand in the front of the doors waving their cans asking for money. If it isn’t bad enough doing that, their parents and/or guardians are standing there watching them and encouraging them to stop every person and ask for money. I mean, you literally have to walk around them and in some cases ask them to move over to get in. Why can’t the parents see that and tell them to move to the side?
Instead of hounding and bothering people trying to do their shopping, why don’t they do something constructive? They could have a carwash, bake sale, candy bar sale etc. I was involved with activities when I was a kid but do not remember “begging” people for money. I think this sends a wrong message to the kids. It tells them that instead of going out to earn money for something, it is easier to ask people for the money.
There is, however, one person I give money to. Every once in a while there is an older gentleman, who sits at a table well off to the side of the doors, who collects money for disabled US veterans. He does not wave a coffee can, block the doors or approach anyone. He sits at the table and waits for people to donate money.
Just once, I would like to go to the food store without a kid stopping me, waving his coffee can and asking me to donate money.