My thoughts on it:
While I don't use it, doesn't make it right to remove it. Fix the security hole in it. Or just leave it open. Most people are not going to "pirate" as much as you think. The machine is an expensive beast. In this economy, who's going to risk putting pirated stuff on it that will more than likely be bricked later by Sony.
The reason this worries me is what if in the future, they decide to do this to other features I might use but others don't? Like BC, which seems to be wanted but not mainstream used. I currently have the original PS3 and it has all the features. I don't want the stuff removed, even if I'm not using it at the time. We never know if another hacker will find a security hole in a PS2 save game (see Twilight Princess hack...). Should I lose BC because Sony doesn't feel like fixing the problem?
If we allow it now, we're basically saying, "Sure. Go ahead and do what YOU want. I'm the customer that paid money for all these features, but do what you will.". This is why we have such horrible DRM. We have servers shut down less than a year or right at that time (Hellgate London). We pay for something, we should be able to use it. This is just a form of entertainment. I, for one, am tired of having any corporation have me give them money, promise me something, and then take it back, but keep my money. It's the equivalent of corporate piracy. They're stealing from you, but let's face it: customers are too stupid to care besides a few minority.