Macs do have a distinctly antisocial habit when it comes to sharing drives with other machines: Mac Droppings. Also known as Mac Leavings or Mac Dust, for those with excessively easily offended sensibilities.
PC users can tell when you've borrowed their USB drive, because your mac left ds_stores and trashes everywhere it went. Actually the resource forks are more annoying, since that means there are (what look like) duplicate copies of everything.
You end up having to clean up after the mac every single damn time. It really is quite irritating.
However you can avoid the wrath of your network drive administrator! There's software to clean up the problem: BlueHarvest: DS_Stores, ._Resource Forks, .Folders. Keep it clean.. It's kind of like those dog leashes with plastic bag dispensers built into the handle.
Talk about niche software! :)
