My mom reorganizes our house, and I LOVE it. I think it would be nice for a regular babysitter or nanny to reorganize the kids' stuff. But a new babysitter just going through cabinets without asking first is definitely crazy and would concern me a little.
I voted Compulsive & Questionable--what kind of drawers were organized? Silverware. No biggie. Underwear? Skeevy.
My mom organizes me house when she comes over (kitchen stuff, LR, etc., not personal bedroom stuff) and I've come to accept it. She's OCD and needs something to do. She's not over-the-top about it, and I actually do appreciate it (and feel a little bad that she's "cleaning" my house when she's supposed to be relaxing).
Maybe this person has OCD?
Very possibly a case of OCD. It was all kitchen, living room and DD's stuff. Kitchen stuff included food in cabinets, though, like really intensely going through packages with just a few crumbs left and removing the box, etc. so that it all took up less space overall.
I would actually like this. I wouldn't want anyone to rearrange my living room and kitchen though.