Invisibility does tend to result in disappearance, that's true.

Shadow was changed to a toggle fairly recently. Also populations seem, at least anecdotally, to be down for this event: less players overall means less gankers attacking from stealth. Then there's subclassing: if your character is now so overpowered as to be a destroyer of worlds, seems little point in fiddling around with being sneaky.

I can confirm that they appear to be alive and, well, doing their traditional imperial city gank-with-no-carried-telvars thing, though.