So in this league we have never had a canceled trade ever, because our general rule is that so long as the trade is within the realm of reasonableness, everyone here is an adult and makes the decision they want. There have been plenty of trades in the history of the league that I would never ever have done personally, but whether something is a "rip off" is really in the eye of the beholder.
In addition, as we all know, billy is a special case. He's not a newbie owner - he's been playing as long as me. He knows exactly what he's doing. People have advised him time and time again. He has sworn over and over that this time he's keeping his picks and building through the draft. Yet every time, he ends up trading all his first round picks for established player. Billy got several starting level defensive players in that trade. Would I start them? Probably never. I think those players he got were terrible. But billy has his own evaluation method (the one where Daniel McCrea is a legend QB), so in his eyes, these guys were worth two first rounders. He doesn't value those picks at all. (and if you read my post about the worst trades in history, his trades actually don't stack up that bad - first rounder bust, but the guy he gets is established) He wants to make trades to win now. He knows what he is doing. And when it blows up, his answer is that he's intentionally losing!
So it's a long way of saying, I have always agreed that we should protect newbie owners from bad trades, but simply put, that almost never happens anymore. Everyone plays pretty legit.
The only guy selling the farm for mediocre players is one guy. We all know who. So I consider "taking advantage" of billy to be a special case - I think he has fun doing all his trades (even though they are really dumb trades). In fact, I'm pretty sure it is billy himself proposing these deals, not unscrupulous owners, so I'm not going to stop him from doing it. But I encourage you Grandad, maybe you will finally be the guy to talk some sense into him. Teach him the ways!