I am still on the fence about them. Yes, they cause problems (looking at you, powershell!). Yes, they can be used as a band-aid for thorny issues (Time constraints!). They are a tool, like any other programming construct.

Is making them properties and sticking them in a "GlobalVariablesByAnotherName" singleton and chucking that around better? Possibly. Possibly not.

I have found, however, that any code where someone has used global variables is hard to share with other developers. Maybe that's the crux of the matter.