I guess so, I've staffed on some (inactive) forums and I tracked members' activity in certain sections, so I guess they'll probably do the same thing here.
I am very knowledgeable in 5th Gen, given how good my posts in B/W are.
I wouldn't think so, I'm sure the h-staff will find suitable candidates for each. It's more important to master the cards you're holding, than to complain about the ones your opponent were dealt.
What do you think may happen if all the main series games got their own corner, separate from PGC, Challenges, Spinoffs, Trade Corner and Battle Center?