bytheblood makes a good point, and better to be safe than sorry.
Now, I have been sitting with friends on more than one occasion and had someone walk in and accuse them or someone else in the room of stuff like this. Things that all of us in the room knew were not true, as we had been sitting together for quite some time and the accuser would say "just a few minutes ago, in my room, that's why I came looking for you." I think some people just enjoy making others nervous, worried, etc. bullying, if you will. Once I was working on one of my rooms, I had just bought the room and was setting it up. I forgot to switch it over to "myself only" and this girl walks in, says "you copied me!! I am reporting!!!" and disappeared instantly. My room was not even close to being finished, I had never seen her OR her room before, and the words came out of her mouth before she had enough time to even LOOK at my room. Some people just can't have "fun" unless they are bothering others.
Anyway, again, better to be safe than sorry, I guess my point is just try not to let it take away your enjoyment of VMK.