You'd think if I trust them with my camera then they will be able to cope with BBF.
Example, last week my brother and his family were over in England from USA, to see our father for possibly the last time, (when his vascular surgeon says he's on quality time not quantity time you get the family together) we had a family evening and with us is a long time friend of my brother which was good as he could take some group shots of us including me, I'm not in many usually behind camera not in front.
This friend is a dispensing pharmacist so has degrees etc ie not a fool.
Right I've set it all up all you have to do is press this button, marked focus on then press this big one under your index finger. Not one in focus picture and I didn't think to check any of them.
Unfortunately due to the 17-85 lens being out of wack at the wide end I had to have the camera in live view focus and I didn't think that would focus from the focus button in green square, not sure if I set green square or not. Either way he had enough info and supposed intellect to deal with BBF and with him being an iPhone photographer I thought live view would help.
Fortunately I did take some pics just means I'm absent from them.
From a keen amateur, this post has been very helpful. Have just taken AF off my shutter and am looking forward to giving it a whirl.
My only observation though: is it that big of a deal when handing your camera to someone else, to point to the BBF and say "here's what you press to focus"? I mean, if the person finds that instruction hard to deal with, then I wouldn't be giving them my camera at all.