As editor of I'm not big on bashing lawyers (except in jest), but this does seem a bit like the modern equivalent of chasing ambulances. A plastics processor reader told me that her company got a call from a firm soliciting it to join a class action suit with other users of plastic additives.
She was referred to a Web site called plasticrefund.com that explains who is eligible for the refund. This particular class action suit is the result of an antitrust complaint that dates back to 2005 involving a dozen suppliers of additives. The materials in question include some heat stabilizers and impact modifiers.
The reader told me: "The firm is based out of D.C. with the sole intent to make filing appellate papers easier for the attorney in class action suits. I found it a bit scary to be called on the phone to join in a lawsuit regarding using materials." I agree.