Of course nothing is imposed on you ... as long as you dont mind doing jail time when you will get caught living with two wives ...
(yes, i mean some states of "land of the free" ... but not free from Victorian era prudishness)
(and to add insult to injury ... even if you do not officially marry anybody ... just living long enough under one roof might make law treat you like married anyway ... unless you do extra legalwork ... isnt that awesome!)
(and want to bet how quickly children would be taken away form parents after first "helpful tip to Child Protective Services" ... shudder)
I am not gonna mention how this situation wrecks havoc with ability of polyamorous families deal with medical and financial situations ... because that would deserve own rant of epic proportions.
"Nothing being imposed?" - would be good joke if not so cruel.
Black and Homosexual movements were all up in arms and demonstrating over orders of magnitude lesser infractions on ability to live their own livestyle.
I think you are confusing polyamory with polygamy.
And you see nothing wrong with disallowing polyamorous relationships to practice polygamy and raising kids?
"I dont mind couples practicing monogamous love, they are free to do as they prefer ... as long as they are forbidden from marrying and raising the family."
Such a freedom!