Well, speaking of REM lines...
I was up for a promotion, and my boss went and hired a guy younger than me, he had lots of mainframe experience, but had NO PC or Microcomputer background at ALL!! My boss told him to modify a particular PC for a specific software package, and first he had to learn how to use the EDIT program, then he "butchered" the Autoexec.bat, after taking forever trying, my boss finally told me "could you please go help him" I was so MAD, this guy that was earning at least twice more than me, had no idea how to EDIT a batch file! It came up to be that he had removed a CLS line, and now the batch file would show all the lines and stay on the screen or something, All I had to do was write the CLS line and add a couple of REMs at the beginning of a couple of lines. For some reason he did not like those REM statements, or maybe someone told him to remove the REMs and maybe he thought just removing the word will do??
Another time I got called to a location where he had totally disabled a processing plant!! He was trying to make room for more software on the hard drive, and he removed the folder(directory) that contained the Ethernet drivers, because he claimed he did not know what it was for. The PC hang, and then on restart(reboot) all kind of errors came up and the PC could not connect to the network to control the plant... GEEZZZ!! I ran the UNDELETE command and restored the folder... Back in business. This guy was dangerous, but was my boss's pet... go figure!