Netpliance
I can't help wondering if the FTC's investigation of Netpliance was prompted by vast numbers of slashdot readers following a link once upon a time to report Netpliance to the FTC for various things.
If so, then a bad slashdot review of a product can be harmful to the health of the company that manufactures it.
The fact is that I think consumers may have been justified in their complaints about the iOpener, but it's just funny to think of slashdot as being potentially responsible for an investigation like that.