Gekko sidehack stick? You're wasting your time though, they're toys. Not really ROI-able. I like mine, but its not something i'd(or could use) use to steal electricity from work and make money.
I've seen some people claiming that you could potentially mine 2 PPC blocks a year with a sidehack stick, making it borderline efficient...
That being said, i have one laying around, havent plugged it in in months because i could run it profitably with my energy rate.
I think the main question you have to ask yourself is: is it worth risking your job to mine a couple bucks worth of BTC (or PPC) a month?