1 - Yes. My company has recorded more than 20 drones operating where they shouldn't (by local regulation) in the last 2 years or so. 2 of those occasions have required maneuvering to avoid collision and another instance led to an aircraft exceedence while the crew were searching for a reported drone shortly after takeoff.
2 - Personally no - but see above.
3 - No.
4 - Yes.
5 - Yes.
6 - No.
Over the same 2 years quoted in 1, there have been less bird avoidances required than drones... Birds have a self preservation instinct. I imagine drone operators lack spatial awareness around their drone (if they can see their drone at all) and presumably think getting close to other aircraft is good footage.
BG