City Of Heroes: Lord Recluse on PvP Rewards and Penalties

Greetings, City of Heroes fans! Lord Recluse was lurking around the offical forums and made this post in response to a thread about PvP rewards and penalties:

If I reward the victor in PvP but don't have some penalty for losing, all I'm doing is making a gigantic exploit. The minute something is given as a reward with no risk, some players will exploit it. Two players could easily team up and say "You kill me X times then I'll kill you Y times and we'll both get the rewards." If it were XP, they use it to power level. If it's influence, they use it too buy enhancements (and the other things we're planning for influence). If the reward is minor enough that it doesn't create an exploit, then people will complain that the reward for PvP is worthless.

I'm not sure I understand the "no debt" approach to PvP. People are perfectly willing to accept the risk in PvE, so how is PvP different? Why should attacking another player (and mind you this is a consensual thing) be less risky? At the same time, I do worry about ways PvP debt could be used to grief people. Believe me, this is a thorny issue.