That's just absurd to expect honest people to pay the price for bad actors. Bandwidth wasn't a huge issue for me like the person who got me to join, he was on mostly during the day and had bandwidth problems all the time, I am usually on late at night into early morning hours so I hardly had problems. People would just throw their arms up into the air and proclaim the site as a joke. You also would totally being doing away with the concept of being rewarded for participation on a website that draws people in to telling people you may have to invest to participate.
RE: The Spam Problem - Some Statistics