twitter: youre passing people on the street eavesdropping on things you vaguely agree with
reddit: youre attending a fan club meeting where you can find and share any information as long as it sticks to one topic
instagram: box of 1$ assorted pokemon cards at a covnention and half are actually magic the gathering cards
tumblr: youre in your house cooking for a few friends and someone climbs through your window and demands your opinion on steven universe