As a reply to the 3 problems listed above...
1) I keep mine in an eclipse System 12 that has a VERY tight hood and the only escapes slot is taped over.
2) They dont squirt ink very often at all. Mine didnt even when he was being caught and bagged. And never has since!!!
3) They dont live very long in the wild either... The pet store kind (Atlantic or Pygmy) only have a 1 year life span.
Well.. thats all I can tell you about that. There are as many reasons to have one as there are not to. What I can tell you is that I know a lot of people with huge reefs, yet their Octi. is their favorite!
Good luck!