Oh yes me too. Most recently was during a music video shoot. It was one of the background dancers. After her denying it, I just grabbed her purse out of her hand, dumped out the contents onto a table, saw and grabbed my stuff, (a eyeshadow, eyeliner and 3 brushes), and dropped her purse on the floor. At any rate, everyone laughs at me because I label everything with my name on it. I've seen whole kits being stolen during Fashion Week. (Not the actual act), I just see the aftermath of the poor MUA's freaking out. Taking pictures with a timestamp of your kit contents is a good idea. Back to theposhcupcake, if it was me, I'd take it back asap, with or without her present. Unfortunately your friend knows you're too nice and won't call her on it, thats why she has it displayed out for you, even if you go the legal route, it will take years and cost thousands just to resolve it. But that's your call. There is one sure thing when stealing from a thief... They're never going to call the cops.