I'm just shooting arrows in the dark here, but my best guess is that it's gone on way too long now for Sony to ban anyone for this kind of thing. It does break the TOS yes, but the longer it goes on, the longer it's an unspoken, unwritten stamp of approval by omission. Legally, if you are aware of a situation like this and do nothing about it, even something as simple as, "we know what you are doing, stop please or we'll have to address this situation" you run the risk of giving tacit approval to the activity.
Certainly they can stop the ability to hybrid, or the ability to take them online, but I think they are well past the point of anyone being punished for this, but again, it's just a guess.