Of course, never let others use your KYC in any way... It's a foolish thing to do, and you can't trust anyone with these things, not even the closest one. Additionally, we need to be cautious about the sites we visit, and especially how much sensitive information we disclose there.
Privacy Exposure: Many of us chose crypto because of privacy, but now KYC has become the norm. To keep playing, some people give in and submit. Even though casinos are required to keep it confidential, hacks and breaches happen. If that data gets stolen, you lose the privacy you came here for.
Well, we need to risk here & there... Hacks & breaches happen, it's not something we can control, and I am sure that staying away from everything (completely off the grid) is not an option for many of us. So let's hope that something like this will not happen with top crypto casinos... I guess most of us from here are active in more than one crypto casino, and some of them have mandatory KYC.