I was running Tam Tara the other day (levelling low alt classes) and there were no newbies running it and I actually missed having a newbie in the party.

That nervous greeting at first, the awkwardness of their skill rotations and the wariness of bosses we have stopped caring about and possibly die...a lot.

I love running with newbies!
I feel that it is so important that we make new players feel welcome because we were newbies once and had awkward rotations and not aware of tactics and possibly died...a lot!

So when you are in a dungeon and you have a newbie for the first time, appreciate their awe and wonder at their first run and make them stronger with advice and a bit of care.
Because the newbies of today will be the pros of tomorrow.