For the bases loaded catcher's inteference situation, it really is a RBI.
Check out this link, which purports to list for 1957-2007 the bases-loaded CI situations. I only checked the first 12 games, but in 11 of those the batter was credited with an RBI, according to my cyphering. What about the one that wasn't? Well, even MLB scorekeepers can make a mistake....
I haven't searched yet on a bases loaded D3K. By the way, I don't know if scorekeepers commonly use the abreviation D3K. Posters on the baseball rules message boards do, though.
