@N.A.G.A.C.E: Peach is certainly harder to use than it looks. There are Fox players who try using Peach and essentially go, "Wtf? I can't use her!" You should tell him that button presses aren't indicative of difficulty to play, and that he should also consider movement/approach options. Fox generally has more options that Peach, and so in some sense, is easier to use than her. I would just shrug it off though, if you're maining Peach, you are going to catch SO MUCH BS for using her. Everyone here can attest to that. =P
I like your idea about analyzing top player vids. I wish someone would be willing to do that though. Hey, Armada, maybe you'd like to talk about one of your own videos? =)
Campy Foxes...if Fox is just standing at one edge, SHDL'ing and stuff, I've found that a good way to handle it is to float close to him, high enough where upsmash/lasers won't reach you, but a place where you can threaten him with FC fair. It's similar to how Peach deals with Falco, by floating over lasers, but you don't want to attack Fox. You just want to make him feel unsafe.
Say you're on FD. You want to float at probably...2/3rds of the stage length, with Fox being in the smaller portion. You're closing off his space, and yet you aren't "approaching" in the traditional sense. Now Fox has to reconsider his lasers, because a good fair will put him in a bad position, and possibly lead to an edge guard. You can try dash forward > WD also, to bait him into going after you.