“Reply All” should never be used.
Unless there is an extreme need (i.e. an extenuating circumstance that requires mass communication) to a previously sent message or it is mutually agreed upon between all parties involved that a conversation should take place via email.
Otherwise, you may be signing yourself up for a throat punch.
Seriously people. Seriously.
I don’t need to see your reply to the cute puppy picture someone sent out. I don’t care if you have grandkids to share if someone has sent a picture of their grandkids. In almost every case, I don’t need your two cents. I don’t need to see your comment about anything someone sent out that isn’t directly pertinent to me.
We have enough email to wade through on a daily basis, let alone to have to deal with people inane comments about stuff that is only remotely related to me. And by remotely, I mean I happen to work in the same organization.
Good grief. Stop using the Reply All!