This is a good idea I remember my last ugly experience with a casino I won't mention their name here, they have multiple wallet addresses for both deposits and withdrawals and are unknown to me, I just copied a different old address from bookmarks and sent a deposit to play with, I waited and no confidence messages or balance depositing on my account then I know something is wrong.
If they don't allow users to reuse addresses, they can simply hide those used addresses and no longer display them for users. They must have warning each time users copy an address, like this is one-time address, and reuse it will cause fund loss, for example.
If they display a list of used addresses and users will lose fund if making deposits to old addresses, it's sort of trap from that platform. They played ugly like your words saying about them.