Lets say that someone slanders the company (any company), states that they are an unsafe operation, badmouths the CEO, CFO, SVP, EVP etc. This all goes against the Social Media policy that Delta and other corporations have set. Then if someone takes this meeting video and posts it to You Tube and it is there for the public to see. (Even if it cannot be posted someone can take a video of the monitor and post it)

As a result the corporation takes action, and said person is not in trouble with their employer for comments made at a LEC meeting.

Do not think this is crazy. We have had people post other things to You Tube as well. Find a way to make sure that the receiving end of every user that signs on this way is secure and you deal with the problem. This is the one reason it is not happening. It is not specific to Delta. There are plenty of other ALPA pilots working for other carriers that have been fired for just speaking their mind in crew room meetings. (No I am not kidding) Now to have a tape of these comments that can be stored, not good at all imo.
I too would love to have all of the meetings played live with a service like "Go to Meetings," voting from your home etc, but as I stated we need to deal with the end user security. Most corporations know the level of security on both ends, we do not.