It really seems as though it is time to look for another living situation. It doesn't seem that your roommates are taking you into consideration. I'll tell you this. If I came home and anyone was playing with my collection I would snap. I personally have spent to much time and money getting the animals that I have and to risk them because some idiot thinks that they are cool is ridiculous. What would have happened if your big female would have bit the person, not that the person would have been seriously hurt. Would the person report the incident to the landlord, or the police? Could they try and sue you for the injuries? You really never know.