The anti-bullying notice is available now in "select countries," and should be available elsewhere in the "coming months."

Whether or not this proves effective is uncertain. Instagram said that its efforts to reduce bullying in comments have been "promising," but that doesn't guarantee similar performance for the posts themselves. Someone caught up in the heat of the moment might hit "share anyway," consequences be damned. And there will be moments where a vicious tone may not represent bullying at all -- calling a politician stupid may not be constructive, but it's not bullying. Still, this could be helpful if it leads even a handful of people to mend their ways.