I think a simple "caveat emptor" would have been sufficient, if you really felt the need to comment at all.
For whatever reason though you chose to take it personally, which is just...weird.

I'd say you'd be better off channeling that anger towards something in your life that really deserves it and if not, there are plenty of injustices in the rest of the world.

What JAG thinks about his Poser 8 purchase should have no bearing on you or your life and certainly didn't deserve the level of assault you launched on him for it.