Feature to block certain buyers from seeing your gigs on fiverr

[finalstep]

This may have been brought up before, but it really needs to be implemented. I have a guy who keeps purchasing my gigs over and over without reading instructions, then when inform him of the fees for what he wants he immediately asks for a refund. It wastes both of our time and hurts my cancel rating. I don’t think implementing this feature would have any negative impact.