I'm sure that's true. I also know a few Mormons and Christian Scientists whom I like and respect, but that doesn't mean I would become a Mormon or a Christian Scientist. I think Mary Baker Eddy was a silly woman, but some of her followers are very decent and intelligent people.
As a Catholic, I would never become a Mason. That doesn't mean that I think all Masons are evil, or are anti-Catholic. Most are well intentioned. But the Masons have a regretable history of anti-Catholicism in certain times and in certain places even today (that lodge in Italy, for instance). Some of our greatest founding fathers were Masons, but I don't think it was their membership in the organization that made them great.
I don't believe any of the popes have been Masons. Since Vatican II the Church has been a little too eager to approach any and every group, and maybe some Church leaders were too tolerant of Masonic membership for Catholics, just as our great Pope John Paul II was perhaps too tolerant of Islam. But that doesn't mean he thought that Catholics should become Muslims.
I wouldn't become one because the hats look silly. But I look at it this way: If the gates of Hades can't prevail against the Church, then the gates of freemasonry will hardly be much more of a threat.