Here is what resurrected this "debate" thread (so the mods know I wasn't trying to stir up trouble).
My cousin commented that he wanted to get one to fix the slop in his AR. I hadn't heard of them so I started doing some digging on forums and such to find out more about them.
Ultimately I told him he should worry more about the cheap handguards that move a quarter inch in either direction, and less on the two millimeter gap in his receivers.
He unfortunately still wants one, and hey that's cool, it's his gun. I did however come to the conclusion that I wouldn't personally use one.
"No free man shall ever be debarred the use of arms. The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government"
-- Thomas Jefferson, 1 Thomas Jefferson Papers,
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