A very poor scope was most of the first Tasco scopes that were made in the late 70's - early 80's.
Another was the Bushnell Buck Horn.
Another is the Leupold Rifleman.
Most of those cheap scopes that does everything from light your cigarette to range find that are sold in catalogs such as Hunters Warehouse is total crap also.
Don't forget the old Cats Eyes scope either! BSA - crap!