I always cringe when someone goes up to the mic and the first thing they say is "can everyone hear me, is this too loud"
I second that. But I'd re-articulate it to "Can you hear me? Is this thing on"? Of course it's on since you grabbed the correct microphone!
And if there's a band setup on the stage, and a speaker walks on stage to introduce the band, who has has received perfectly clear instructions to "use THAT microphone RIGHT THERE" grabs a totally different microphone, bangs it with a his or her hand, can't hear anything in the PA, and after I've found the correct mic to unmute and maybe mute/reduce monitor level first thing that person says is " We finally have some sound! Alright folks...". This goes for me too once in a while, but the first and best thing I've learned from my early "mentor" was that "All people can be idiots, remember that"