This was for fxp sites. I was a mod on a fxp board. We would make locked directories eg with deep paths and Lots of Whitespace that ftp clients couldent handle easy and Hence not Enter without knowing the tricks. Also using reserved Windows names like aux would prevent owner to delete or even crash his server trying anything. Later came tricks like undeletable files as different sites would fight over the same ftps. I did however find a way to make the undeletable files 0 bytes to reclaim space. Later we just started to hack servers and install our own protecteed ftp server but by that time i has moved into the Real scene and running multi TB top rated sites in unis in US, netherlands and Korea with affiliation to top traders and release groups. Thats how my programming interrest started being the guy who set up glftpd servers and bots for IRC. After a few big FBI operations in 99 and 2001 i had enough excitement and left the scene.