Craftsnatcher: by all accounts an untalented or unoriginal person who chooses to pass off the work of artists and otherwise crafty people as their own.
Craftsnatch: a)see above b)the act of stealing or reselling another's handicraft
Craftsnatcherous: like the kid at the next desk eyeballing your paper during an exam, a craftsnatcherous person sniffs around forums and craft fairs seeking ways to copy other people's work.
Craftsnatchity: a)see above b)when someone's behavior is suspiciously craftsnatcherous
"I can't believe you're not ashamed of your blatant craftsnatchery!"