1. Yes, several pilots i know, Including one last month that had a drone fly within 10 ft of his external load while he was in a hover trying to set it.
2. no
3. No
4. yes
5. Yes
6. Cleaned one off the rotor blades once. Never even felt it.
Check this out
https://au.news.yahoo.com/a/36329029...y-beach/#page1