Communications Major

Instagram has blocked a large number of hashtags — the keywords people use with "#" as a prefix to make their images more searchable — and unsurprisingly most of them are obscenities. The Data Pack has a large list of hashtags that Instagram has rendered unsearchable. You can tag your photos with them, but doing so is meaningless because no one will be able to search for them.

LOS ANGELES — The world's attention wavered between the tragic and the silly in 2012, and along the way, Web surfers searched in huge numbers to find out about a royal princess, the latest iPad, and...