I'm sorry it reads that way. What I'm trying to say is that you have to look at the whole picture.

"Let's say I kill a high profile individual on the street you know, hypothetically."

If you say that, you have to take into account what kind of person might do that. It's a person who is not thinking normally. It's something that people thinking normally might be tempted to do, but they wouldn't actually do it.

"Do you seriously believe that I'd be casually hanging out in public at a McDonalds with a manifesto and loaded gun in my bag?"

This is something that someone who's thinking normally wouldn't do. But, we've already established that someone who kills someone else on the street isn't thinking normally. You can't start from an assumption of normal thinking for someone who you've already hypothesized is a cold-blooded killer who killed a stranger on the street.