Because Oakenfold and Cream knew the album would be rare, the artwork warned people that there would most likely be bootlegs produced of it. Bootlegs were indeed made, although they can be identified as none seemed to contain the warning, nor do they contain the Cream logo on the album cover.
Since Oakenfold and Cream recognized the album would be scarce, they indicated that bootlegs might be produced. Bootlegs were indeed created, though none included a warning or featured the Cream logo on the cover.