Stopping "arbitrage" and resellers.

I think we have a great community here, and a great sales platform. Does anyone else think that Fiverr should protect sellers by banning buyers who buy our work for $5, then sell it for sometimes as much as $100 or more?

Would it be a violation of Fiverr TOS to contact websites where our work is displayed, and let them know that we only charged $5, and if they paid more, they were ripped off?