Simple question, I'm sorry if this doesn't deserve its own topic but based on the answer more discussion could be warranted.

If a Paladin Divine Shields and then dispels Unstable Affliction from a teammate, do they take damage or get silenced? If not, is this a common tactic used in Arenas?

That will remove UA without getting the damage, same with COS.

When I had UA it did about 3-4k when dispelled. It's hard to track because the damage gets counted as the dispeler's damage. A priest friend of mine just shields himself and rolls the dice with his dispels as long as he is not being focus fired.

The only counters to UA, that I am aware of are:

Divine Shield - all dot wipe no penalty
Ice Block - all dot wipe no penalty
Fel Hunter's Devour - no penalty if UA devoured

For a priest you can Shield and ProM yourself and roll the dice dispelling, but it's not a pretty option.

Fel Hunter devour makes UA blow up on the felhunter does it not?

@Ignayshus: I'm not talking about bubbling out of UA that is on the Paladin. How viable would bubbling and dispelling a partner's UA be? After the UA is gone, your Priest can easily wipe all the other debuffs in a few casts while you heal up in bubble.

None of the mob dispels in general will proc UA (shadow labs channelers for instance). It might be an oversight on blizzards part by not marking the felhunter dispel to trigger UA or that UA itself is coded such that it won't work against a non-PC in general. However, even if it did work against a felhunter, odds are pretty good that it would get a decent partial resist with all of it's natural resistence to magic (140-238? depending on spec) and the silence is shorter then the cooldown for devour magic as well.

I think it would be better to save the bubble to get rid of a spell lock/silence/cc rather then actively using your bubble to dispel someone else.

You cant bubble when silenced/spell locked.

Paladins can only dispel 1 magic debuff at a time and affliction warlocks have a dispel resist talent IIRC. The player is probably going to have 3-4 dots including UA so bubbling specifically to counter UA probably isn't worthwhile. You might as well be cleansing if you happened to be bubbled for some other reason and no one needs immediate spam healing though.

You can bubble out of silence, you can't bubble out of a locked spell tree. IE: I'm casting and I get hit by counterspell, I can't bubble; A priest's "silence" skill, or improved CS when I'm not casting can be bubbled through.

My warlock partner has started running with a spellstone in 2v2's. That clears UA without the damage/silence effect.