Yes
Yes
Yes
No

One of my favorite reasons for believing the moon landing, Buzz Aldrin and his responses over the years to the deniers. People having the gall to tell him to his face what he experienced in life that ended up getting a punch in the face.

The space station is absolutely up there and it can be easily seen from earth with a minimal telescope. Just as MIR was and as Skylab was. 

Elon is JUST the type of person to actually put the car in space. I can't think of any other CEO that would do such a brazen thing. The technology speaks for itself now with the multiple booster landings and reuse. 

As for the flat earth, all I can say is that is is about the same mentality as the child hiding behind their hands saying, "You can't see me! I'm invisible!" They know better but they just can't seem to stop playing around.