I Stance-Dance on my Scholar all the time.

The key thing is you have to be comfortable with the content. I never go into new content, dungeon or otherwise, with Cleric Stance on. I'm a Healer first, and I think that is a key point that a lot of healers tend to forget. It's not that most people have issue with Healers DPSing, it's just a simple trust issue because there are many healers out there that let their teammates die, or otherwise leave them on the fringe of next-to-no HP, simply because they can't be bothered to get out of Cleric Stance and do what is their main job.

That said, if you are comfortable with the content, and are able to switch in and out of Stance-Dancing with no affect on the party, and they still don't like it, tell them to shove it.