Instagram is banning a number of hashtags in an effort to protect users from a variety of threats: identify theft, lewd or otherwise offensive content, take your pick. The idea is to protect users from seeing offensive content and make existing photos more searchable.
Business Insider noted a few interesting hashtags that came up:
#kikmeboys: Two tags that might be used by prostitutes gathering clients on the messaging service Kik are also banned: #kikmeboys and #kikmenow.
#thinspo: Instagram has also moved to discourage users who promote eating disorders as a weightloss inspiration, under the #thinspo tag. Other banned thinspo tags include #thinspiration, #loseweight, #proanorexia, and #probulimia.
The Data Pack has used the Instagram API to create a list of hashtags that have been blocked on the photo-sharing service, preventing users from being able to search them. It’s a pretty thorough list which, I’m sure, will only increase as time goes on. Take a look here.