below r ( UPDATED ) steps && code for removing all ur activity from facebook ( deleting photos, untagging urself from other photos, unliking, removing comments, unfriending, etc. ) w/cleaner code graciously modified by Seth @subimage
in facebook, go to ur activity log and show "All" or pic a sub-section to filter by ( Photos, Likes, Comments, Search, etc. )
next copy+paste the code below into ur console && press enter
after that you can enter
leaveFacebook(); into ur console to remove ALL of ur activity, however if u'd like to specify what u'd like to remove u can enter it w/the corresponding parameter like
leaveFacebook('Report/Remove Tag'); etc.
pixelgrease left a comment on YouTube which might help those that noticed some of their likes lingering even after u run all the scripts
this second method is a performative + much more cathardic approach to unfriending all ur friends, u'll need to be familiar with Max/MSP + u'll need to download a ( free ) third party object called aka.mouse developed by Masayuki Akamatsu.
copy the code i wrote here && in Max/MSP click on FILE > NEW FROM CLIPBOARD
you should see something like this in your Max/MSP window
this patch will control ur mouse so that it automatically clicks && unfriends your friends for u ( while u sit back && watch ). the first two "moveto" message moxes control the position of the mouse relative to the friends button, this will likely have to be edited so that the coordinates match your screen's. use the second bang button to check where the mouse lands ( also use the aka.mouse "Help" file to learn more about it ).
NOTE this is very glitchy, facebook will occasionally refresh itself, so u’ll likely have to quit the max patch ( by clicking the patch and hitting the “esc” key ) and start over again.