Thanks very much. That issue was a pretty tough one for us - we ended up investing quite a bit of work in fixing it so we could ask for read-only permissions when people first sign in and then ask them to upgrade to write permissions only if they attempted to do something that required them (like clicking "follow" on another user): http://lanyrd.com/blog/2012/twitter-read-only/

It was worth fixing though - only a small number of people really cared, but they were the kind of discerning user that we wanted to reach. Plus it was clearly the right thing to do.