Re: "F" chord is now outlawed
My hand is big enough that I use a "thumb-over" technique, especially if it is just a quick beat. My buddy that got me started in this git thing showed me this technique. He's been at it for over 45 years playing in quite a few good bands. My thumb goes over the top to get the Low-E string while my index finger takes on the Hi-E and B strings. The E-shape still slides up the neck as in a full barre.
'91 Epiphone PR350E
'11 Taylor GC3
'15 Taylor GS Mini/Mahogany