Birdman55: I can perhaps throw some insight into why it "came to their attention that you were employed"....
Remember that C/A's do both soft and/or hard pulls on your credit reports with Equifax and TransUnion (inquiries). Even if you've been on ODSP for some time, but working prior to that, your employer information sometimes gets listed on the first page of your credit report(s) under the Identification section.
To correct this, and to stop these fishers of information at the pass, you can simply forward your current un-employed status (or disability) and get them to update your report(s) accordingly.
I did this in person and my files were updated instantly. I imagine that you could send a letter in or fax or perhaps even call them to do this same thing on your reports.