My employer is currently transitioning from ~25 employees a year ago to ~50 now. When I was interviewed last year, the policy was that there was no vacation policy. By the time I was hired a few weeks later, that had changed to a maximum 10 days of vacation a year. They used the argument of 'it leads to people taking less vacation' to justify their new abysmally small policy. Of course, if that was their true intention, then they would implement a minimum vacation policy. But that obviously isn't the case.

My employer does this, I don't mind it. I took a whole month off last year as a block.

As an employee, what you should do is actually take their statements at face-value, but I acknowledge that this may be harder for entry-level guys.

Yes, it depends people by people, it IS OK to take that amount of time off if the 'non policy' allows it, but most people don't do that out of fear / guilt.