It may make you sad, but do you think "don't share anything with your colleagues you wouldn't want your boss to know" is bad advice? Treating people like "dead

It may make you sad, but do you think "don't share anything with your colleagues you wouldn't want your boss to know" is bad advice? Treating people like "deadly competition," is probably not optimal, but being wary of what you say certainly is. I can tell you the Slack Police at my work think so, too.