Thank God many of you aren't really GMs. You would ruin the Celtics for years with cockamamie, Pitino-esque deals. I've seen cap killing deals for washed-up and/or overrated players such as Biedrens and Al Jefferson. You can't contend in this league with those guys as cornerstones.
Also, many of these deals are "wishful thinking" that would would make no sense for the other team whatsoever.
I'm all for throwing around trade proposals - it's fun, but let's be reasonable! Now let's trade our entire bench for Monta Ellis!