I mostly agree with this. I would sit in the aisle, but mainly because it is my preferred seat. That way, if someone tries to take one or both of the blocked seats, I'm still sitting where I'd like to be if the flight was full. So if you really prefer the window, you might want to sit there. You'd probably be less likely to prevent someone from sitting down, but you'd be in your preferred seat.

Sure hope you weren't sitting in the middle, only to have someone take the window and aisle....