Comment on BlueHarvest

Don't want to sound uneducated here, but aren't those ._ files indexes or resources with information about the file?

What comes to mind for me something that's ruined projects for some students I've worked with; they'll be moving between Mac and PC versions of InDesign, and at some point, in their dragging and dropping, leave a .DS_Store or similar file on the PC. When they come back to the Mac, they find their file "locked" as it were. I'm sure for most files it's not an issue, but just thought I'd throw it out there.