I came across an article
How Old Do You Have to Be to Gamble in USA?. In this article, i saw that the minimum age to gamble is between 18 to 21 years. I wonder if the online casino do follow this minimum age for gambling.
Yes, the gambling sites have our age data through the KYC documents. Do they ever restrict anyone who is underage to not to gamble?
Yes, gambling websites may restrict or even ban users if they discover that the account is being used by an underage person. Depending on the ToS of a specific gambling website, a person of legal age is a pre-requisite in order for them to be able to gamble at their website.
Failure to comply with these requirements may compel the said gambling website to ban or deny your withdrawals at any time.
Also, if we find any site allowing minors to gamble, can legal action be taken against them?
As far as I know, this depends upon the jurisdiction of the said gambling website. If it is a land-based casino, then you may report this to your local enforcement agencies. If it is an online casino, the best thing that you could do is to report it to this forum for awareness of everyone.