No, and for some reason I am currently unable to reproduce the problem with gparted, but I'm pretty sure it has been around since before udisks2 as I have always been bit by this when building parted, whose test suite creates a lot of temporary devices/filesystems to use for testing, and udisks --inhibit didn't keep them from annoyingly flashing up on the Unity bar.
No, and for some reason I am currently unable to reproduce the problem with gparted, but I'm pretty sure it has been around since before udisks2 as I have always been bit by this when building parted, whose test suite creates a lot of temporary devices/filesystems to use for testing, and udisks --inhibit didn't keep them from annoyingly flashing up on the Unity bar.