Yes, I tried it for several months. As a result my spam increased by more than 500% to the point I no longer use the email address because of the dozens of spam that arrives in it daily.

It allows you to "bounce" mail, and while the mailings returned may say the box is invalid or non existing, these spammers are way too smart for that.  Any kind of reply back to them indicates it's a valid email and as a result they hammer you with more spam.

I downloaded something called "spam fighter", which I found in a link here.  By blocking addresses that are spam, you are helping out other spam fighter client's as well. 

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi