rogerd - 1:38 pm on Apr 14, 2010 (gmt 0)
I'm seeing a smaller number of blatant spammers, but I'd be much happier if Twitter applied some kind of quality scoring algorithm to root out the slightly more subtle spammers.
Every day I block new followers who have thousands of friends and followers, certainly grown through automation, and mostly low quality tweets - quotes, retweets, and, of course, links to whatever they are selling.
Part of the problem is that almost all Twitter users fail to act aggressively to stamp out these promotional accounts. One third-party tool I use to vet my new followers tells me what others have done. Even for accounts that I consider blatantly promotional, typically at least half follow back. It's very rare to see more than a few percent block an account like that. The balance "ignore" the account, i.e., they don't block or follow back.
If more tweeps got aggressive about blocking, it would give Twitter some data to work with.