That's completely unfair. I think maybe this is just a cultural divide that we should just accept. In britain, pet shops encourage you to keep guinea pigs outdoors weather permitting, all of my friends think it's strange and a bit sad that mine have to stay indoors and they don't get to run around and graze on grass all day. We have stricter laws on keeping dogs than in the US (that I've heard) so maybe we feel safer in the knowledge that dangerous dogs aren't around, and owners have to keep a close eye on them or they may be seen as dangerous and put down (perhaps a bit too far as they do have natural instincts...but anyway..). On the other hand, in the US people often de-claw their cats, which is NOT recommended at all here, as the cats can't then climb trees and fences if they need to escape.
As I said, just a cultural divide, for us it's sometimes better for them outside when it's properly secured - they really don't face many threats, and ok, being mauled by a dog is horrendous, but children sometimes get mauled by dogs too; should we keep our kids indoors at all time with no access to pets? it's just a tragic ACCIDENT...maybe it could have been prevented, but it doesn't mean that the rest of us don't take the proper precautions...
The point is that she now knows that it's unsafe to be keeping her guinea pigs outside, yet is still doing it. When I got my first rat I fed her nutty mixed pellets because that's what the pet store told me was best, however after I found out they were not safe for my rat, I changed. Here it's common to keep guinea pigs in extremely small cages, however once most people learn they are doing it wrong they change. That's why I judged her. Most people after learning they are treating their pet badly would change what they are doing but she is not, hence me guessing that she doesn't think of her pets so much as family but as interesting things. I don't think it's wildly unfair.