6. ADD kills big ideas. Big ideas require more thinking before commenting. Given post A (clever idea on some little thing) vs. post B (radical sweeping idea on some big thing), post A will tend to get more comments. It's easier to respond and say “cool!” or “+1.” Post B requires more investment to comment, so it gets less of them. This is misleading—it suggests A is a better idea than B, when it really just means how much smaller an idea A is.
