Some are and some are engineers
The one to watch out for is JayUtah, he is an engineer and a world authority on the Apollo programme. He is quite good at debunking HBers arguments (Hoax Believers who say the moon landings never happened)
As he has never worked for NASA, he has the advantage of being seen as independent.
Why don't you sign up like I have, it would be interesting if a few of us ventured over there and had our own thread there. I could see if anyone over there wants to come across to TiBB.
If they do, be gentle with them