Derek setting up a facebook account and only being tagged in photos, Christmas passing and the pack finding out that it's his birthday so they all spam his wall, Derek's old teammates tagging him in really old photos, everyone asking Derek 'hey did you check your facebook??? There's an event' and Derek getting overwhelmed by 20+ notifications that he has to go through.
MY GOD YES!!!
I imagine his cute lil overwhelmed face and him turning to Stiles all like hA L P lmao