Instagram potentially provides a digital space in which to post pictures of others without their permission. This could be to embarrass or upset someone - a form of cyberbullying on Instagram.
The site has also seen cruel, hurtful comments added to photos that users have posted, as well as unkind hashtags attached to comments and images intended to upset individuals.
Cyberbullying could also occur through a user creating a fake account to impersonate someone else on the site, posting malicious comments or unkind hashtags, etc.