About time. An no, it's not an entry drug because it exists, it's an entry drug because dealers sell other stuff too - no dealers, no other drugs. And no, it doesn't cause psychoses and schizophrenia, it's just used by people with psychoses and schizophrenia to better deal with the symptoms. And it only leads to accidents when combined with alcohol because stoned people don't overestimate their abilities (quite the contrary).