There is one simple thing to do with all that kind of stuff. The same thing you do with junk email. Look at it just long enough to realize it's an attempt to waste your time and/or to get your money...or possibly to do you harm. That takes about a second or two usually. Don't waste your energy getting upset about it. Just toss it in the wastebasket (digital or 3D), recycle it, forget about it, and get on with something you do want to spend your time on.

Your failure to respond to them is exactly what they don't want. If everyone just ignored them, they'd have to find a new occupation.