I am of the opinion that the place to filter unwanted messages is further down the chain, and not at the email address distribution step. Let them send, lest you impede legitimate senders (who perhaps want to provide you with value or opportunity), and figure out how to triage on the mailserver or in the mail client.
To each their own. You do that with your email account, I will seek alternative answers. In my experience the legitimate senders do not outweigh the spam.
