Social media sites are buzzing after the sudden suicide of beloved comedian and actor, Robin Williams. While the world mourns the death of Williams through tributes across Twitter and Instagram, his daughter quit social media after trolls bullied her off.

Zelda Williams, 25, took to Tumblr on Tuesday to write a heartbreaking goodbye note to her father. "He was always warm, even in his darkest moments. While I'll never, ever understand how he could be loved so deeply and not find it in his heart to stay, there's minor comfort in knowing our grief and loss, in some small way, is shared with millions," she writes.

Shortly after Williams' daughter posted the tribute, she was forced to quit Twitter and Instagram because of "cruel and unnecessary" comments that were left by bullying trolls.

Twitter users @PimpStory and @MrGoosebuster began tweeting fake graphic images of a body directly to Zelda Williams that they claimed were her late father.  Williams told her followers to report the offending accounts, but later deleted the tweet. "Please report @PimpStory @MrGoosebuster. I'm shaking. I can't. Please. Twitter requires a link and I won't open it. Don't either. Please," the tweet read. She posted a butterfly photo on her Instagram account saying that people were "judging" her for the amount of photos she posted of her with her father.

Williams sent another tweet later on saying she was going to leave her social media accounts to avoid being bullied. Her accounts are still active, but she says she has deleted Twitter and Instagram apps on her phone.

"I will be leaving this account for a but while I heal and decide if I'll be deleting it or not. In this difficult time, please try to be respectful of the accounts of myself, my family and my friends. Mining our accounts for photos of dad, or judging me on the number of them is cruel and unnecessary," she writes.

The last message Williams received on Twitter and Instagram from her father was a photo of them together, as he wished her a happy birthday. Williams was frequently seen on the red carpet with her father, and the daddy-daughter pair starred in a Nintendo commercial together.

Recently, the women's interest site Jezebel also had to deal with trolls when individuals started to gruesomely post rape images to Jezebel's comments' section. It seems that Internet trolls are becoming more than just an annoying side effect of the Internet and are now starting to impose emotional abuse on their targets.