no need for warning before restricting peoples account. Before registering on any gambling platform or any online account, I think they will write a whole lots of terms of agreement and ask you to click "I understand"
That also means they can get away first before the casino even has a chance to do something about it.
Imagine telling thieves that they will be arrested after robbing the bank. What will they do? They will try to escape as early as possible.
Gamblers put blames on casinos when
1. They use two or more accounts on a casino.
2. When they lose all their money gambling over and over again.
It is either they cheat or they lose all their money, the guilt of not stopping when they should is what prompts them to start talking shit about the casinos,
But why do people break the rules? I think it is a very good practice when a casino, knowing that a person on their site with double registration, or previously banned and having some claims from the casino, opens another account again and is blocked at the moment of winning.
No need to stand in ceremony with cheaters; this will only increase the trust of normal people who know that fair play will have fair winnings.
This is more like asking for a second chance right off the bat!
Accounts get restricted as you said for breaking the ToS, why would a casino tell the users, hey, we know you are using a multi-account, you are using a VPN to pay from a banned country, we're going to give you a warning, and then shut it down anyhow because that's how it was supposed to be. I can't see why a casino would want to just inform the player he is risking a ban when that might anyhow come, it will simply make players leave, and nobody is going to risk it further.
There are many more valid point in the comment section that I would have added to this quote but I just picked randomly and to be honest, everyone gave a very valid points based on their opinion.
A reputable casinos will not unnecessarily restricte a players account unless the player has broken the rules, and for players that doesn't bother to read ToS and doesn't know when they are going against the ToS, it's not the fault of the casino for the ignorant of such players, perhaps everything is written on the ToS.
Only a scam casino will restrict players account without any fault from the players end and such act from a scam casino is to steal players funds. Thank posse for your contributions.