I can totally see why content coming in, unfortunately, sometimes, is really getting out of control. Like here An Update to our Community and an Apology or there (or not right now, but maybe again in a few hours).
It makes sense then, to lock things contentwise. That is also great for existing content that shall never be changed any more, like that world famous example.
But then: I would very much like to simply vote on some of these posts. And I really do not see a good reason to prevent the voting to take place.
Voting data is meta information. Just counters, that reflect the level of appreciation by the community (or lack thereof). The number of votes doesn't relate at all to the content that needs to be protected, or sadly, prevented from being added.
Thus: can the "model" for "locking postings" be made more fine granular? Or at least: changed to allow voting?