I think that people who draw conclusions about something like this are just saying what they feel about the piece, or someone else put the idea in their head. For an entire group of people to say that a plain black box means the same thing to everyone in that group is a bunch of B.S. I feel that you perceive it to be however you want to, they're your eyes and your brain so what ever it means to you is what it is. If some artist wants it to mean something in particular, than they should give the piece a title that has something to do with the topic. I went to art school and believe me I had major problems with these art students who thought they were above and beyond because they could find deep meaning in a line of red paint on on a piece of canvas. I respect abstract art and think it is very cool, but I also think that art is what you make it out to be, but don't feel stupid, just feel confident in your own opinion.