Give up before you start! Your internet presence is there, somewhere, for the rest of all time - or close to anyway.
You can delete your main stuff (social network accounts, email addresses, etc) just to get rid of that first layer but you'll never purge your existence entirely - as BrickInTheWall says. I wouldn't worry about it. Amuse yourself with the thought that some mail order company will have yet one more bounced spam email!