We did the same thing using the character for a non-breaking space, I think it was ALT+0160. It would sort last in the list, and just be an effectively-invisibl

We did the same thing using the character for a non-breaking space, I think it was ALT+0160. It would sort last in the list, and just be an effectively-invisible entry unless you were really paying attention. Combined with an exploit we had to change users on the FTP servers behind most dialup ISPs hosting (the free couple Mb hosting you’d get with your dialup account that very few people cared about or used), meant we had pretty much unlimited file hosting, filling random families web hosting with hidden folders full of mp3s and warez.