After wasting 6 months, I chose to delete my account.

Lo and behold, soon spam started to show up on this account, as if the floodgates had been opened.

Facebook is also guilty of this.

I set up a Facebook account for a relative around 2006. The e-mail address is name_facebook@ a domain that I control.

Every six months or so, Facebook will send out almost daily e-mails for a month saying "Person x commented on your post!" or some variant. You know how I know this relative of mine didn't make a new post?

He's been dead since 2011.