Very, VERY good to know.
I was pained to release that secret
Disclaimer: My experience is based on CMBN 3.12. In theory, it COULD have been changed in recent versions. But based on BFC's track record of finding and fixing issues like this, I'd be highly surprised.
An easy way to test if it still works like this is simply to hide a team behind tall bocage and then see if you can still draw a target line to the other side. Then try the same with hedge, low bocage, etc.