Do you know who is using your profile? How can you protect yourself? Many of our colleagues, our current President included, have found their likeness and resumes being used by translation vendors without their permission.
Payment Practices (www.paymentpractices.com), ProZ Blue Board (for members only), Translator Scammers Directory (http://www.translator-scammers.com/) and others are tools we can use to defend ourselves and, sometimes, counterattack.
Familiarize yourself with these tools and the scammers out there trying to take advantage of your name and reputation.
Besides non-paying clients and low-paying clients we also have to deal with unscrupulous practices. Stay alert. Check your profile and search for your profile regularly.