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you could yes, but that doesn't delete it from the internet. What you have posted on FB is saved on their servers presumably forever. Further more, if your profile is open/public, there is a snap shot taken of it every so many minutes/hours that is also saved on the internet forever.

This is how people who delete Reddit posts or Twitter posts can still have them come back to haunt them.

Reading up from the privacy guys (put your tinfoil hat one with me) if you go thru and delete every like and every post one by one, then wait 30-90 days for all of those snap shot services to capture your blank profile and THEN send the delete request you should have limited your exposure as much as you could have ....

it honestly probably doesn't matter, but it makes me feel better doing it that way :)

OH, but that's very good to know and a great addition to the post. Thank you. Hope people read the comments down here... :)