Sometimes ways to create havoc, or damage, in an effective, anxiety inducing, yet anonymous way enter my mind. Not that I want to do it, just the theoretical option is there, and gets thought through.
Sometimes it pops up in conversations, and people are kind of shocked by it that I think things like that, because overall, most of the people have more violent tendencies than I have. But they do not have the macabre thoughts. I find that weird. But they think that about me, so, we're even. Maybe it is good that they do not have the thoughts, because they have the urges. And for me it is the other way around.
(Today the thought on how to infest a whole area with bed-bugs, without getting caught, entered my mind.)