Oh, me too! As soon as I realised it was a Pen I thought "Oh for FFS, that's FFS gone for 3 matches...". I get it's the rules but some leniency and on situations like this they should take each situation on it's merits. Wonder if we would appeal or just deal with it...
It's sadly the rules though - the players know it, even though it's instinct to protect your face it's gonna be a red. Harsh and annoying for us, but it is what it is.