@levi:
I love to place in my Global-Screens hints etc. Or sometimes even wierd stuff, if you ever have seen the screens where it looked as if I used third-party-tool .
I don't think it makes a big difference, if people know where to mine (as most of the time I leave some hints). From my experience a global in any area has nothing to do with the usual findings: to me it seems, the finding of a global is time-based or based on general loot's ups or downs, but to me it seems, globals never have anything to do with locations.