Part of using POSes (your own or that of others) is risk. The risks are fairly obvious, and I don’t think it should be the POS owner’s business to mitigate that risk for those who use the POS.
I will say this much, however: I do think it would be nice for everyone with assets (or at least offices) in a POS to be notified when a POS is under attack (or at least has a defensive layer broken). At the very least I feel this should be done for w-space where 1. there is no asset safety and 2. the invulnerability periods are substantially shorter than k-space. It kind of sucks to wake up one day and find a gazillion killmails because all your assets in some POS in w-space got blown to shreds when you didn’t even know it was being attacked in the first place.
I know that commentary isn’t directly related to what you propose but I do feel it would help prevent a similar sense of victimization regarding loss of assets and POS destruction.