It seems like it was just a hobbyist project to recreate the look of the font from the anti-piracy ads? Which is 100% legal.
Edit: OK, so the original font appears to be "FF Confidential"? Why didn't the post even mention that? So maybe it is a digital clone, which would be illegal. But then strange that there aren't any DMCA takedowns of it on major font sites?
1. Catapult Entertainment made/commissioned XBAND Rough as a clone of Confidential for their use somewhere (promotional materials, PC software, who knows?). The font file contains the text "Copyright 1996 Catapult Entertainment, Inc. All rights reserved".
2. The "You wouldn't steal a car" campaign pirated Catapult's copyrighted font file. I think they got away with it because Catapult was no longer in business at that point. They were acquired by Mpath Interactive in 1996 and Mpath's IP got acquired by GameSpy in 2000.
If the digital source is the only thing that can be copyrighted, then you have to prove the digital source is what was used inappropriately. If you can't prove that, either because it didn't happen or because there's no technological way to prove it, then you can't prove copyright infringement.