The problem I have with it is that the Sun shareholders own something of value - namely the brands, technology, and organizational structure (that is, they don't own the employees of course, but the do 'own' existing business relationships with those employees which could be transferred, and those relationships have value). Even if the company is not worth what it once was, shouldn't the shareholders have the freedom to sell off the assets of value which they own to an interested buyer?
Capitalism is, first and foremost, about freedom - that people should have the freedom to do business without undo interference by the government. The great economic tragedy of the current political climate is that all the people who are hating on capitalism right now forget that the *reason* the USA has traditionally chosen a mostly capitalist economy (I say mostly because, it definitely hasn't been a 'pure' capitalist business system in a long time) is because that is the most Free system of business.
There must be a very compelling reason, indeed, to impinge on the freedom of others. Sun shareholders should have the right to sell what is left of the company to a willing buyer.