I thought dogs were banned at muir but last weekend there were plenty of them there. Not sure if those parties had special permission to have them but they were there.
"The Mountains are my church and climbing is how I worship" - Tommy Caldwell
If your dog is allowed in Muir, they will have their own Muir Valley "dog pass" which should be on their collar. Without the tag, feel free to confront the offender, and make sure they understand. I am betting there are less than 6 dogs officially allowed in Muir. Torrent, I believe, has a similar restriction which has an exemption for special friends of the land owner.
its the outdoors- it (the illusion of private ownership not included) belongs to the living- while your ability to post some bullshit on a climbing forum gives you some delusion of superiority over God or his creation you are incorrect - feel free act responsibly - you may well chose to deny God, that is your right but could I suggest you deny gravity as well