The thing is, some people think that it's only when they give out their personal information on casino sites that their details can be sold out to scammers.
No reputable casino would do that, as it would only destroy their reputation and hurt their business, which generates more money than they could earn by selling data to scammers. There's nothing to fear as long as we register with a regulated casino. They will take care of our details the best way they can, knowing they could be penalized if they leak any information.
So the first thing we have to do as a gambler is to research for a reputable casino, and if we are active in the forum, I'm sure it will not be hard for us to find those casinos. I'm not saying it's guaranteed that our information will not be leak, but as long as they have good security, it cannot be hack and sold. So the word "trust" is very important.