LOL!
wouldn’t surprise me if they have a system something like that in place. However, I wouldn’t expect them to be so obvious about it.
I agree, I wouldn’t doubt they have a system like that in place. And of course, in their minds they are so much more intelligent then the rest of us that they would doubt our powers of observation and they would assume their system wasn’t obvious to anyone but them. lol
Now seriously, I was reading somewhere that either gangs or would be thieves have been using symbols to mark their marks. Such as an arrow means seldom home and an X means home all day, etc. After observing they place a mart as a way to determine the best time of day, if any to target your home. Not sure if they would use dots that way, but that is the first thing I thought of. And if I remember it correctly what I read, this has been done in places in Europe over the last several years though not with dots.