Raise your hand if you’ve joined a fandom because you saw it on Tumblr.
Raise your hand if you’ve completely avoided things because of the fandom you saw on tumblr
both
Raise your hand if you know enough about a fandom to be in it because of tumblr, but haven’t actually watched the show/read the book/etc.
all three
oops
Raise your hand if you tried to get into a fandom because the fans made it sound awesome but it turned out to not be your cup of tea.