Yes, yes and no.
As an ex-law enforcement officer I regularly removed rattlesnakes, coral snakes, etc. from areas when they came into contact with humans, usually releasing them into remote areas afterwards.
I ended up with a couple that couldn't be released, as they were non-native escapees (it's truly amazing what escapes both from "hobbyists" and the airlines...here in Fla. undeveloped areas adjacent to large airports are virtual zoos)
As to our tanks at home, we have lionfish, scorpianfish,rabbitfish, mantis shrimp, etc. and have never been stung by our pets either.
Blue rings are short lived, as are all the dwarf octopi....they usually die shortly after the eggs hatch, and by being small are easier to maintain than larger specimens, although using a small tank invites disaster.....if they have enough room, cover and food, they don't usually want to leave.
On the other hand, you probably won't see the animal without night vision goggles or a red light either, and even then only rarely.
As to life span and difficulty in feeding, it doesn't seem to save thousands of seahorses (oops....I forgot...they are cute...sorry)
The biggest single danger with a blue ring is that you often don't know you've been bitten until the poison takes effect due to lack of initial pain and small size.
My suggestion.....if you MUST have one, give it a large tank with LIVE food, do NOT put your hands in the tank, and be aware that it is deadly.
To me the two most dangerous animals commonly found are.......2) human beings, and 1) human beings with guns.
Your children are safer with a blue ring in a tank than with your gun in the bedroom.
