MaxTheater Inc, makers of Spyware Assasin has been ordered to suspend it's activities until a court hearing. They have been accused of using scare tactics to get customers to buy their product. Pop-up ads, emails, and free spyware scans would indicate a spyware infection even if one did not exist.
More information can be found at:
Reuters: FTC Says Anti-Spyware Vendor Shut Down
FTC.gov: FTC Bars Bogus Anti-Spyware Claims