Crew Room Lawyer (def) Usually the loudest person in the Crew Room (or on the Forums), a person who hates their job, who gets in trouble for doing things they aren't supposed to, and passes on bad advice to rookies.
To the new people coming down here, some advice, as I was in your shoes once before, and have never forgotten that:
Avoid the Crew Room Lawyers.
If you have questions about things, find the people who actually know what they're talking about (like @RTOMan).
And as I tell all the rookies I come across, if you see me in passing and need to pick my brain about something, feel free to do so. I don't bite (usually).