Twitter has a "delete" feature that allows you to nix those comments you never meant the world to see. Now Tom Scott has an application that allows folks to recover deleted public tweets and bring back the shame. Note the declared usage for the "Good" and "Evil" modes.

Tired of the infiltration of spammy comments on Google+ posts? A new Google Chrome browser extension called "Nuke Comments on Google+" allows users to delete spam comments on posts and block users with one click. Once you install the browser extension you'll see a new button sitting next to comments that say “Nuke”.