If the thing is allow more simplicity for regular users, I think this is OK, unless someone finds a way to trick the system so it lets someone install something

If the thing is allow more simplicity for regular users, I think this is OK, unless someone finds a way to trick the system so it lets someone install something that isn't signed, and someone will. Probably. For boxes that need more security, this could be an opt-out feature. I personally don't like it that much, but I think it's good for people who don't want to think too much about it. But then again, people not thinking too much about stuff is why spam is thriving.