Marymouse, I agree with all of your rules except the one about pure nps trading. Since you can't sell unbuyables in your shop, it's only fair that you sell them on the TP.
I really do detest the "reserved", "not for trade", "join my guild", "safekeeping" type of trades, though. I've seriously thought of just reporting every one I see, and maybe getting my like-minded friends on Neopets to do the same, just to see if TNT would crack down on these things (I haven't tried this because that's probably considering backseat modding and would only aggravate TNT staff). I don't think this sort of offense deserves a freezing/suspension, but I think it does warrant a warning and TNT should cancel/delete all such trades.
I am also sick of people not posting what they want in the wishlist. GAAAAH. I mean, sometimes some items are so rare that they only show up on TP, and only a few, and sometimes NONE of those traders give info about what they want so I'm clueless as to what to offer and I have to neomail each of them to ask and wait for their responses and...and...okay, /end rant. >_< Point is, TP can be very annoying. It's also invaluable to get rare, unbuyable items, but a bit of modding from TNT would improve it greatly.
More on topic, I would say go ahead and report this trade.
You can tell TNT what you think is wrong with it; it's up to TNT to decided whether they think it's a scam or a harmless advertising scheme.