Cortez
Tough but Fair
No. The sensation of bridle sitting on short, clipped hair ends cannot be pleasant for the horse. It isn't exactly difficult to sweep forelock hair forwards and mane hair backwards.
Yes, about an inch or so. I have a native & I'm aware that it's not 'correct', however it makes my life a whole lot easier than trying to wrestle thick mane into a comfortable position under the headpiece, and means he's not uncomfortable when I get it wrong, so it's a no-brainer to me.
Sorry - I voted yes as I thought you were asking if we trimmed over grown branches from bridle paths! No I don't cut a bridle path in my horses mane. Remember at school they told you to read the question properly before answering.....