Sarah Moon is an educator and digital communications professional I respect. Recently, she wrote about the difficulty of dealing with plagiarism and gave some tips and motivation for handing this issue and I like what she has to say:
No one has a right to steal from you.
Thieves are not entitled to be treated graciously.
Plagiarists do not have a right to explain themselves or claim that they’re somehow doing you a favor.
Your original work has value—don’t let anyone tell you differently.
Read the rest on Sarah’s blog.