I'm a current downstate ms4, feel free to PM me if you have questions.
I would be wary of joining any Downstate group on fb run by administrators or adding them as fb friends. This isn't just at Downstate, but in general. Keep your professional/academic life separate from your social life. Issues have come up in the past (at other schools, not here thankfully) of people posting pictures of things/people/situations etc deemed inappropriate or unprofessional by whomever it may be and had action taken against them.. it's not common, but it happens. That being said, though, a lot of people in my class are friended to administrators and are members of groups run by them, etc. In the end, it's whatever you're comfortable with.
I'm prettttttttty sure November is still early. lol. When I applied I interviewed at the end of January and got in w/o first being waitlisted.