By enabled by default I guess you mean usable by default but not active in regexps by default? That sounded scary for a sec.
Oh, yeah that does sound confusing. I meant the feature is now shipping by default. Let me correct…
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Oh, yeah that does sound confusing. I meant the feature is now shipping by default. Let me correct…