Where can I find other posts on this topic? I searched the forums but couldn't find them. I know they're everywhere.

Anyway, my friend started playing online poker and buys in for $80 at $1/$2NL tables.

Why is it better to buyin the full amount at lower stakes (as FTR suggests)?

I don't actually no the reason. He is not used to playing deep stacked. So he'll probably do better playing with a 40bb stack. I don't know if he's ever layed down pocket aces. But I don't know if there has ever been a time when he should have done (since he mostly plays 50bb or less).
Why should he buyin full? (or is he ok as it is?)