You think its ignorance? It could be, but I notice that people that do this do it *every* time. Maybe they are just ignorant of the fact that "the way they do it" is annoying and causes issues for everyone?
Definitely curious about this...
KMRUNOUT
Not that the people are stupid, but ignorant of the ettiquette and reasoning. Like others have said maybe they think they are doing it the right way...
Personally, I read about it in Byrne's book. I don't recall what I was doing with the chalk previously, i.e. I wasn't really thinking about it.