Oh, yes. Liam being part of that would be cool, it'd be the host before Sabine, so she'd be like 'WHY DO I HATE THIS HUMAN SO---oooooh okay'. Lots of passive aggressive shit being thrown his way.
YES. TELL HIM OFF ALL THE TIME, but please don't shoot. Austin will probably ask for a bullet proof vest at some point 'THE SUPERNATURAL DOESN'T SCARE ME, YOU'VE ALMOST KILLED ME MORE THAN THEM'.