I think your frustration is justified, I mean we've had Crows supporters gloating left right and centre about a player who most of them probably have never seen. If (and I still believe it's a big if) we secure Walsh I hope no Sydney supporters come here to troll.
On the bolded part, you're being a tad dramatic. Players are traded all the time, no team has a list of players who were only developed by them and when you get a chance to grab a promising KPP you should do it.
I will be proud of the Swans if we manage to secure Walsh as it would be a smart move, but of course the Saints will rightly feel cheated after the work they've put in.
Any idea what the swans want to offer us for Walsh? Are any of your players up in this trade offer.