The definition of restraint
mood: 
sick
sickmusic: Holly Brook - Saturdays
Todays definition of restraint - Keeping all hint of "I think you're a moron" out of my tone of voice while explaining to the customer that typing an email address into their browser won't get an email to us.
How can someone who received the instruction to "email us the stuff at 123@example.com" via email not have some inkling of the difference between email and a web page? It's not even the first customer who's said "I keep putting 123@example.com into my browser and it comes up page not found".
Come on, people. This isn't even an advanced concept here!