Ouch! I have not cut myself with a rotary cutter but I can feel your pain as I read the posts. I try very hard to remember to close my blade every time I put it down and to keep my fingers away from the edge of the ruler. I do know someone though who was coming to guild meeting and had her cutter in her purse. She reached in to grab something and sliced her 4 fingers inside around the second knuckle bringing up a bloody hand. Oh! I can still feel her pain!
Be careful!