I think the only time I ever noticed i got a -rep was when a mod +repped me and spiked up my green bars so I went to check who it was. I hadn't checked it in so long, I was shocked to see the anonymity feature. The -rep comment read "BAWWWW the new layout sucks" in response to how I said that I liked the new layout of the site wayyy back when it was implemented. I just chuckled and went on with my day ;3
In all honesty, I think this is an improvement to the site. The extent to which the rep drama was escalating was completely unnecessary and very immature anyway.