It's happening again.

Last night I was walking to university and got asked the way to my halls of residence by a group of students. I told them, but after they'd thanked me and left it suddenly hit me - what if they weren't students? What if they wanted to attack the place and I came back to carnage and it was all my fault? I know it sounds completely irrational but I was actually quite worried for a while.

I'm scaring myself and it's all my own fault.