Re: Better maturity filter?
Good idea. Actually, the "age" of an account which follows me is one of the criteria I use when deciding to block/report an account for spam. I also take into consideration things like the number of tweets, and how much detailed info is listed under their profile.
I also consider the number of followers in an account that's just followed me. As a general rule -- there's always exceptions, of course -- if an account's followers number in five digits or higher, I assume it to be a spam/bot, a "celebrity" account obviously run by a bot, or one of those hucksters who's buying/selling fake followers, report it for spam and shit-can it.
"Quotes" accounts are the goddamn' worst. I tweeted a favorite clip from the Beatles' Ed Sullivan show gig on John Lennon's birthday, and less than an hour later got a bot follow from a "Beatles Quotes" account. OK, I really dig the Beatles, but I don't need a goddamn' Twitter spambot spewing quotes from Beatles songs at me every day, especially as I already own every goddamn' album, and then some.
Something more evil I've recently heard about -- and I doubt Twitter's doing jack about it -- is some flat-out evil SEO bots actually modifying peoples' tweets and/or inserting images that have nothing to do with the tweet in order to pump up the SEO clients' Google Juice.
Hell, with that shit going on, the trolling is the least of their problems.