Nick have thicker skin. I am a business owner 
too and I know what it is like. Don't take it 
personal because then you start to sound petty 
and it seems that people are trying to egg you 
on. Focus on your real customers and don't bring 
yourself down to anyone's level. You kicked them 
off your site and this person wanted to get to 
you and it worked. I feel for you but you have 
to have thicker skin because stuff like this 
happens to every business.