It's the same as giving free knives to anyone who wants them.
What's your point? They want the knives, so they get them, and then what?
Put a table full of various knives outside your house with a sign saying "free knives" and see how long that lasts
I'm willing to bet that it will last until all the knives are gone. What's the scenario you envision that specifically makes this table of free knives in front of my house a bad thing? I am keen to understand your position here because from my point of view that's called a "yard sale."