I used one of those username generators that combine two random words and one of those random words was potent. I was reading Chamber of Secrets at the time and immediately thought of the potions book Hermione used to make the polyjuice potion, called “Moste Potente Potions.”
It absolutely bothers me when people correct my pronunciation, especially if we are in front of other people. In general I think it is rude to criticize or correct people unless they have invited you to do so.