Does polygamy affect the children born to such environments?
Aside from the fact that they fuck their little girls as a matter of course, ask their sons if pollygamy is a wonderful thing.
That's like saying weed is bad because "criminals" sell it.
Polygamy is not inherently bad, just as weed is not inherently bad. But when it is criminalized, the people who sell it (or practice it) must go under the radar to distribute/get it...
But freethinker, the polygamists out in Wonderland do more than just marry many women. They marry blood-related family members and under-age children.
These things are illegal for safety reasons.