ogm guys minecraft crashd!!!111!1!
The [MC-#] pertains to an issue listed on
this site, with the names matching their respective issues. It appears exploitable issues are hidden from common users, as I tried to figure out wtf the book one meant but couldn't access it even after making an account. Not like we can't learn it, but matching the issue to some text on the internet probably isn't completely simple...
Does that beacon thing go through blocks, it would really suck trying to have that thing under ground and having this bar of light go through the earth. It would also be cool if there were a way to choose who it affects.
It works through transparent blocks like glass, but considering what it CAN do, such things as needing to have skylight to work are understandable limitations. As for choosing who it effects, I don't think that's possible but surely that can be a future feature the way SethBling works in relation to them.