I used Power Delete Suite to edit then delete all mine. Just bookmark the big red button and open it on your profile page. From there, you can tweak it a little before it nukes everything.
That thing never worked for me. It sends me to my profile, even when I'm already there, but then it starts with an "Error retreiving CSS from /r/PowerDeleteSuite" message. When I then click on "Proceed" it just gives me this page and nothing else happens: https://i.imgur.com/jVEjfDF.png