Politicians can not be trusted, i don't if the guy I meet who give me information is saying reality or it's information he is using to blackmail me or not, what's your take in this information, do we need to trust politicians.
These stories seem to have been made up by the person who told you them, but similar things may happen anyplace, and politicians can also pretty nasty. If you agree with what he is saying, there must have been a method for you to find out more before posting about it, and it is untrue to imply that politicians cannot be trusted in general.
Because you encountered a few bad apples among them, you cannot generalize that everyone is evil. Politicians, specifically, are not all morally upright and some of them should not be trusted. I fail to understand why the guy would want to blackmail you with such information.