There are few fan bases as dedcated and coordinated online as the devotees of Taylor Swift.

Jake Gyllenhaal, one of Swift's former boyfriends, found this out for what is surely not the first time on Tuesday, September 29, when he posted a young photo of himself in glasses to his Instagram.

The photo reminded many Swift fans of her 2012 ballad "All Too Well," which many have suspected was written about the end of her relationship with the famous actor.

Though Swift has never publicly revealed the inspiration behind the song, fans have focused in on clues like a Thanksgiving visit to Maggie Gyllenhaal's house and a famous photo of the pair drinking "maple lattes" to formulate their theory.

When Gyllenhaal posted his childhood photo, Swift fans were reminded of yet another lyric from the song:

"You used to be a little kid with glasses in a twin sized bed."

Obviously, the only thing Swift fans could do was write that lyric over and over again in the comments on Gyllenhaal's post.

jakegyllenhaal/Instagram

Social media couldn't believe the lengths Taylor Swift fans were going to!

Many others felt Gyllenhaal knew exactly what he was getting into.

To this day, Maggie Gyllenhaal still fields questions about Swift's scarf.

Does Maggie Gyllenhaal Have Taylor Swift's Scarf? | WWHL youtu.be

Swift fans have always been known for going to extremes.

Once you date Taylor Swift, you're part of that world forever.

Sorry, Jake Gyllenhaal, maybe you'll be able to avoid tantalizing the Swift-i-verse with your next post.