So this means that they will disrupts players while playing because they find that a certain player is not following the rules? Also I think that the casino thinks that it is more efficient to block people during withdrawals as people who don't follow rules will be filtered out. Though it's somehow unfair for gamblers who don't follow the rules given that the only moment they know that they are being flagged is when they win. But I guess it's all the gamblers fault given that they don't follow the rules at the first place. People are actually lazy reading rules but when they got flagged, They are very enthusiastic on making long post like scam accusations.
I think Casino blocking players accounts who are exploiting the casino is a just move. These players are breaking rules to take advantage of the casino which is considered as breach of contract. I don't find it unfair because the casino blocked these cheaters during their withdrawal after these cheaters won some huge amount. I support this kind of action, blocking or banning the account of players that are breaking the casino rules for their advantage.
Aside from that, ignorance is not an excuse for the player to conduct such cheating, or to break the Casino terms. It is the players responsibility to read everything about the casino's terms and condition, once players are found guilty of breaking the casino's term, or exploiting and cheating in order to take advantage of the Casino platform, it is reasonable to block these players especially when they are trying to withdraw the winning from these illegal actions.