Sometimes, this page can be a good answer in itself
http://letmegooglethat.com/?q=let+me+google+that+for+you
If someone asks something that is very easily found trough google, then google it, and put it into letmegooglethatforyou and post the link ^^
Being nasty doesn't help anyone and it might even shun new blood from the analog-community and is counter-productive.
I have to say, I think LMGTFY easily comes across as snarky and rude, and I know at least one large/popular forum where using it is explicitly banned in the terms of service.
As for the repetitive questions, I'm with Matt, summicron1 and BrianShaw on this. Answer or don't answer, but please don't be rude or contemptuous when someone asks a question which
you think they "ought" to have found out for themselves.
The fact is that there are people on here with thousands of posts and decades of good experience and great skill; that doesn't, however, mean that those people have thereby gained a right to tell others (with stern moral zeal) what they "should" (or shouldn't) be doing, and is certainly no excuse for being peremptory or unpleasant, however much you feel provoked by what you see as the asininity or laziness of the question.
I sometimes find myself feeling I have to PM newcomers when they have been bombarded with negative responses, to try and encourage them to ignore the ass-hats and bigots and stick around.
It's important to remember that assuming a newcomer is aligned with one's own vision of how photography should be practised is fraught with danger (example: the assumption that negatives will be printed and not scanned; I'd be amazed if more than a small percentage of film sold worldwide ever sees the inside of a darkroom. Or that everyone is signed up to traditional photographic virtues of - say - sharpness, archival preservation of prints and negatives, or absolute consistency of process.)
Or just, as Mr. Schrager said, more succintly, play nice ...