TRAP

During the summer of 1995, Stephane Charette‎ wrote a little utility to "trap" a co-worker. Download TRAP.ZIP to get both the application and the source code. Then run the executable from the command line or put it in the startup folder. If you're really daring, you may even want to try the following:

reboot using ALT-F1 and choose option 'C' to get to a command prompt, rename the file \OS2\PMSHELL.EXE to \OS2\PMSHELL.OLD, copy TRAP.EXE to \OS2\PMSHELL.EXE reboot

Note that when run from the command line or the startup folder, a simple CTRL-C or CTRL-BREAK will terminate it, while the above 4 steps will not give you the option to press CTRL-C or CTRL-BREAK.