Reaction to Instagram’s announcement Monday that it reserves the right to incorporate users’ photos and likenesses into ads, similar to Facebook’s sponsored stories, was swift and furious on Facebook, with many users posting about quitting the photo-sharing application, and even some possible dissent within the Zuckerberg family.

TechCrunch reported that an Instagram photo posted by user Clayton Cubitt — which pictured the relevant part of Instagram’s new terms of service, along with the caption, “Instagram’s suicide note” — was liked by none other than Arielle Zuckerberg, sister of Facebook Co-Founder and CEO Mark Zuckerberg.

Arielle Zuckerberg does not work for her brother’s company, but rather, for the Wildfire Interactive division of Google, which does incorporate a heavy focus on Facebook into its marketing software efforts.

Cubitt went on to post a screen shot of Arielle Zuckerberg’s like, along with the caption, “I’m sure Mark Zuckerberg isn’t too happy with me today, but his sister was very nice.”

Readers: How did you react to Instagram’s announcement?

Screen shots courtesy of Clayton Cubitt.