>>> Using the
messaging service is a voluntary decision
>>
>> Once a critical mass uses a
messaging service, it's not a
>> completely voluntary decision, especially when there is
>> no open standard with inter-operable competing apps.
>
> This is false. Market dominance does not transform a
> proprietary product into a basic utility. What I mean is
> that simply because a proprietary product has a large
> mass of users does not mean the users have the right to
> demand that it be regulated like a public utility.
(Emphasis added). Messaging services are special because of network effects. The postal service, the telegraph, the phone system, the Internet are all special services.
I would argue that email should probably have some special regulation beyond SPAM - the way big players like Google and Microsoft handle email is actually a problem already - perfectly good email, from a perfectly valid domain, from an ip without any terrible history - can sometimes end up as SPAM. This in turn makes it harder for people to compete by hosting their own email, in essence market dominance prevents competition -- and harms the commons.
(Yes, the initial harm has been caused and is being caused by spammers -- but the dwindling possibility of running decentralized services on the Internet could very well end up being much more damaging than the cost of SPAM ever was).
And IM and video chat and so on could probably also need some more regulation at some point - because it seems obvious the big players are actively working towards artificial monopolies in order to control the flow of data, so that they can sit on the biggest pile of meta-data (and sometimes data/content) in order to make money (in the short term from simple meta-data/network analysis and advertising, in the long run from having the richest data set on which to do more advanced, automated machine learning).
In this crazy world in which water and other natural resources, previously controlled by and for the public, I can see how people would argue that it somehow makes sense for a private entity to curate and profit from the information that hides in the rich metadata of all human electronic communication -- I think it would be a very good idea to regulate this along the lines of other commons. An example might be parks and spaces accessible to the public - where there are certain things that owners cannot do - or have to do.