Disclaimer: I offer no warranty on this code or it’s effects. Use at your own risk.
Step #1: Get Google Chrome
Step #2: Go to the Chrome Web Store and get CJS ([[ Web Store Link ]]
Step #3: Go to your hidden users area in OKCupid.
Step #4: Click the CJS icon up by your address bar.
Then hit save.
It should start running. Hitting hide also refreshes the page and since your code is executed upon page load, it is like an automatically running unhide. If you have a LOT of hidden users (I managed to hide 13,000 of them) it may take awhile.
Step #7: Leave a comment on this post about how awesome it worked for you (or didn’t work).