First, your personal information was leaked when buying a house, because real estate agents make a living by buying the owner information of major real estate projects. Don't believe it when you say it. General high-level owner information, as long as about 400 yuan, you can buy all the owner's personal information, including apartment type, building number, floor, telephone number, name information and so on. As for which link was leaked, the channel of this intermediary is different. Some can buy from housing developers, some can buy from property companies, and some can even buy from the Housing Authority. It is difficult to keep the information of all owners absolutely confidential, which is the same in the whole country.
Secondly, regarding safety, I think it is absolutely safe as long as the landlord remembers the saying that there will be no pie in the sky and persists in its implementation.
Third, in order to compete for housing, the intermediary will create a nonexistent high-priced customer, attract you to further tell him the housing information, and even let him see the house and take pictures. He should have a clear understanding and not be cheated. Ask more about the average price around, and there are still too few customers who will buy a house at an obviously unfair high price.
I hope I can help you!