Because the Twitterverse is not going to get any easier to decipher when it's full of false idols and marketing driven Twitter strategies. It's going to be less of a trusted network and more of a "channel." Personally I say "YUK!"
1. Twitter is like IM broadcasting. 2. Twitter is not something you leave open and follow. 3. In order to effective in "working Twitter" you have to manage the stream of Tweets.
Just BE REAL. Don't AUTO-ME. And dont SELL at me. Many think Twitter is an advertising platform, well, folks, I guess if the entire web is an advertising platform then go for it, but TwitterSpam and TwitterPorn and TwitterViruses are becoming real and annoying. So by becoming an AUTO-BOT you are injecting your REALness into that SPAM stream. And, as my old dad used to say, "You'll get what's comin to ya."