When recruiting security personnel, why do you put them on a permanent blacklist?

If it should be the recruiting unit’s own behavior, as a security guard, you must first give people a sense of trust. This sense of trust not only comes from your skills, but also from your sense of responsibility. If If you agree to apply for a security guard job, but go back on your promise, it is actually an irresponsible reaction, and of course you will be blocked.