”Recently, I went back and looked at some of the reviews I did in the 1980s and was surprised at how outraged I was by the existence of bad movies. Before I was a critic, I knew they were out there, but only in a theoretical sense, because I didn’t go see them, and if I did by accident, I’d just walk out (something you can’t do as a critic). So I was harsher then…”
Source: How nasty can you be in a negative review and get away with it? | Datebook