You may be astonished just how many people had not the faintest idea what the squelch did. Those that had a rough idea often thought that it worked the other way round.
It doesn't hurt to have these little memory joggers from time to time, but shawky, get the hang of spreading the word with a modest subtly. In my day, the captain would reach across and belt anyone that he thought was trying to tell him something. Think yourself lucky you're in the modern world!