Simply put,
If I physically wanted to lock my revolver, make it incapable of operation, then I'd put a padlock across the topstrap of the revolver. Couldn't even close the cylinder that way and have the stupid thing loaded.
Little internal lock through the frame=STUPID
I'd rather not have anyone in my family try to rely on one of those rediculous things or try to remember if they remembered the keys to their revolver. If the cylinder is closed then I want to assume that it's ready for action, if the cylinder is open with a padlock across the topstrap then it's abundantly clear that it's disabled. The internal lock creates a bad situation, in my book atleast.
Then there's the traditionalist in me, I just plain hate it on principle alone. Ofcourse all my S&W revolvers are a minimum of 20 years old and likely all my future purchases will be of models of similar age if not older.
There is a part of me that downright hates that S&W is catering to people who actually want these features in their guns. I mean crap, when will people educate themselves to the point that they will see past the need for such a thing in a firearm? A freaking cable lock is often enough to disable 3-4 varieties of firearms from bolt action rifle, to shotgun, to semiauto handgun, to revolver. To sit there and tell people that this revolver is suddenly more desirable because it's got an internal locking gizmo in it, it's nothing more than marketing hype for people who are likely relatively uneducated about firearms or their use.
In the back of my mind, this quote from k5blazer on page 1 is what I keep thinking and fearing.
One of the things that bothers me about these locks is that some people will see them as an excuse to forgo firearms training. The lock will give them a false sense of security. 'It's not loaded'! will be replaced with 'It's locked!'
Not that people have to have a love affair with firearms inorder to own them, but I'd atleast like to think that they have half a functioning brain cell up there that can see alternatives to the method that is provided.
I similarly hate the Remington locking shrouds on Rem700s, Remington safeties on the 870, and the HK USP lock in the main spring housing.