Quoted from kaneda:
Difference is Chevy doesn't take $70,000 and not deliver a car. Imagine those forums if people got screwed over.
Indeed. I'm just speculating here, but probably 90% of the negativity on the site is contained in the Jpop, Skit-B, and JJP threads.
Jpop and Skit-B imploded and took a boatload of pinsiders' money with them. JJP is still afloat and hopefully here to stay, but the repeated delays make many people nervous. I know how it is. I was in on a WOZ LE preorder for 2.5 years before selling my spot after still not receiving a game after all that time. The wait was stressful at times and made pinball a lot less fun for me. So I sympathize with the people in these various situations.
The common thread between the three is that a lot of people have a lot of money on the line. When you mess with peoples' bank accounts emotions run high and things can spiral downward quickly.