Don't...
Don't ever tell a person how to do their job.
It's demeaning, degrading, denigrating, disparaging and any other negative word (preferably starting with the de/di- prefix) that ultimately results in insulting the person you are talking to.
Here's why:
1. You know absolutely jack-all about the job scope and requirements. You really don't, so don't pretend like you do.
Just don't tell the electrician (plumber, contractor, gardener, handyman, barista, cashier, etc) that he doesn't know what he's doing and he's a moron. Why? Because you're the moron for hiring an electrician (plumber, contractor, gardener, handyman, barista, cashier, etc).
2. You wouldn't like it if someone told your ass how to do your job. You really wouldn't, so don't pretend like you'd actually act all gracious and accept the "constructive criticism". You'd probably want to punch the person right in the face.
There's nothing worse than a know-it-all. Those were the weirdos we hated in high school and wished they would secretly shut the hell up every time we heard their voice. In Grown-Up World, no one really knows it all, so when you pretend like you do, we all know and accept that you're just a jack-ass who doesn't know his head from his tail.
Take my advice and just don't do it. You don't want to piss people off who are ultimately in charge of things that are important to you (your TV, toilet, home, garden and plants, daily coffee, grocery discount, etc).
And especially don't tell people how to do their job at a restaurant. Waiters spit in food. Yes, they do.
Til the next post.
Peace.
