It's good to have a thick skin for all the folks that will question / belittle your playstyle and accomplishments in game.

That being said, if they start violating Terms and Conditions of game as Ughmahedhurtz points out, unleash the reports x5, the GM staff will take action on the offending account. I've watched people who were spewing fairly profane things at me literally get disconnected right in front of me, some return 3days later - one in particular I've never seen logged in again.