The more time I spend on Twitter, the more confounded and confused I become as to the service’s purpose and merits. Is it a news reporting device? Is it a celebrity PR machine? Is it your television? Twitter can try to be all things to all people, but Twitter does have a serious people problem — a user problem, really — where new users initially sign up and engage the service, and then abandon the nest in flocks, and that’s a bad and dangerous precedent for any social media mingling service.