Little Matthew Ouimet is a sad little sack who is angry at society due to his debilitating Crohn's disease, so he takes it out on the world by scamming people online (and cheating at video games).
Crohn's Disease is a terrible thing. My mother has it, my uncle had it, I've been tested for it (that wasn't fun), another friend of the family has it. I'm well aware of how horrible it can be.
I'm also well aware that it's no excuse for being a scamming little shite.