Gentlemen, there are LOTS of theories and ghost stories regarding us Freemasons. From the legends of the Templars, to the devil worship, to the secrecy, to Washington D.C., etc etc.
Just know this: The Freemasons are a fraternity that takes good men and makes them better and the ultimate goal is to behave in manners that better mankind. That is it. The goal is "to serve". I joined the Masons in the spring of 2002 and was raised in August of 2002. I am not as active in the Lodge as I once was, but I carry the teachings of the Freemasons with me every day. When a man joins the Masons, he becomes part of a long tradition. He becomes a "brother" in a fraternity. That brotherhood is very deep. That man takes an oath to carry himself with respect, dignity, and compassion not only of himself, but first and foremost to other Masons and their families, and then obviously to the rest of the people they deal with every day. You can trust a Brother and he can trust you.
An example of the depth of the Brotherhood: Back in the 1950's there was a Mason who so poor he could not afford to buy a train ticket to get his daughter from their small town in Virginia to the University of Iowa where she had been awarded a scholarship for academics. She was all ready to go but when it came time for her to leave for school the dad was not able to have saved enough money for a train ticket so she was going to miss college. A fellow Brother heard of the situation and organized a car-chain of Masons from their town in Virginia all the way to Iowa. Each part of the chain drove her sometimes 30 miles and sometimes 100 miles, but the daughter of a Mason was handed over to Mason to Mason for safe travel all the way from Virginia to Iowa. It took her 3 days to get to the University but she made it in time for classes. THAT is the depth a man and his family is dealing with when he takes the oath seriously. The level of trust and the amount of giving each Brother shares with one another is amazing.
I could go on and on about about the good. There is no bad.