This is a goofy theory, but I'm genuinely curious about the technology. If Gossip Girl had actually been running in 2007, how could Dan have submitted posts, received anonymous tips, uploaded photos, and published everything while surrounded by other people?
A modern approach might use a REST API, an SMS gateway, and a database: Dan could text a scandal to the backend, while anonymous tips were stored and forwarded to his phone for approval. Photos would need to be attached to those tips and later included in published posts. He'd also need some way to make the site work across flip phones, BlackBerrys, and early mobile browsers, with wildly different screen sizes and image formats.
Were SMS relay services, mobile web tools, and hosted file storage practical in 2007? How might someone have designed the system using the technology available at the time, and how long would it have taken to build? Also, would sending updates to roughly 5,000 subscribers once or twice a week have been affordable for a teenager?
4 Answers
The timing matters. Facebook and plenty of other large web applications were already operating, so the backend itself was not science fiction. The harder part would have been mobile access: pre-iPhone phones often had limited or expensive data connections, and mobile browsers were inconsistent. A BlackBerry would have been a much more believable control device than a random flip phone, especially for checking email, approving tips, and using a lightweight admin page.
The build would depend heavily on how polished the site needed to be. A basic version made by an experienced developer could probably be assembled in a few weeks, while a reliable system with anonymous submissions, photo handling, moderation, archives, mobile layouts, and mass notifications might take a few months. The infrastructure would likely be manageable, but SMS costs could become significant. He could reduce that expense by posting updates on the website and sending short alerts or links instead of blasting the full gossip to every subscriber.
He probably would not have built a polished real-time system at all. The practical version would be email-to-SMS or SMS-to-email, with a small web dashboard for moderation. Incoming tips could go into an inbox, and Dan could reply with a command to publish one. Images could be uploaded through email or a simple form, then resized on the server into a couple of preset formats. Object storage was less convenient than it is now, but hosting files on the same server was completely normal for a site of that size.
The basic idea was definitely feasible. SMS relay services already existed, and people were receiving automated alerts on pagers and phones well before 2007. Dan could have used a dedicated number or gateway that converted incoming texts into emails or HTTP requests. A simple server-side application could then store the text and photos, publish approved entries, and send alerts back out. It would not need modern cloud infrastructure—just a rented server, a database, and a fairly basic web application.

That also avoids the hardest part of the theory: trying to silently operate a modern app on a phone that may not have reliable always-on internet. Text messages and email were much more dependable, even if the workflow was slower.