As Humbug pointed in some of his pos, in Europe (and much more in Spain where I am) is not so common going to concerts with hats (not even caps!), so every time I tried to stealth with cap, I felt a little bit suspicious as I was probably the only one in the whole venue.
I always considered the collar positioning of mics inferior quality level, don't know why, probably because they might be having more obstruction (a friend of mine used to clip his mics in the shirt jacket, bad idea!), but looking in past messages I didn't find nothing against this kind of taping.
So, can I use collar positioning of mics instead of hat with aprox same quality?