The “service” the accounts would provide would definitely be opt-in and not likely to annoy anyone. It’s hard for me to explain it in depth without possibly opening up the idea to squatters. To put it very generically, the idea involves making Twitter less annoying for your followers that don’t share in all of your same interests.
As it stands, there’s basically no commercial intent behind the idea, it’s basically something where I want to solve a pet peeve of mine.
I’ve done some analysis and the overlap between the pattern of account name I’d like to use, and existing accounts is around 2%, so doesn’t seem likely to bother anyone.
Of course the primary issue is creating the accounts and the mobile phone requirements that entails.