Insensitive fans upset the Dolan Twins with tweets about their father's death. Ethan and Grayson announced their loss on their Twitter accounts, saying they need to spend time with their family. But shortly after, some fans tried to turn the funeral into a fan meet-up and then things escalated quickly.

Sources:

[Dolan Twins]
https://www.youtube.com/watch?v=ycX37ZuUyY0
https://www.youtube.com/watch?v=b1xC8-Igd0I

[Dolan Twins on the News]
https://www.nbcnews.com/news/us-news/youtube-stars-dolan-twins-ask-fans-not-treat-father-s-n961741
https://www.buzzfeed.com/bradesposito/youtube-dolan-twins-funeral-fans

[Emma Chamberlain]
https://www.youtube.com/watch?v=pxiGfyeCJZU

[K-Pop Stars]
https://www.youtube.com/watch?v=Hd7vZGGgVU8
https://www.youtube.com/watch?v=5qy1LKJ3DZI
https://www.youtube.com/watch?v=kFLTvkk4r78

[Stan/Fandom Culture]
What is a Stan?
https://theoutline.com/post/2425/when-stan-became-a-verb
https://en.wikipedia.org/wiki/Stan_(song)
https://genius.com/Nas-ether-lyrics
https://en.oxforddictionaries.com/definition/stan

Beatles Fans:
https://www.youtube.com/watch?v=dOcYTOBA0CI

The Psychology of Fandom:
https://www.psychologytoday.com/us/blog/why-bad-looks-good/201805/dont-i-know-you-how-twitter-makes-people-familiar
https://www.youtube.com/watch?v=otraUu1avBU
https://www.findapsychologist.org/parasocial-relationships-the-nature-of-celebrity-fascinations/
https://www.tandfonline.com/doi/abs/10.1080/03007766.2013.798546#aHR0cHM6Ly93d3cudGFuZGZvbmxpbmUuY29tL2RvaS9wZGYvMTAuMTA4MC8wMzAwNzc2Ni4yMDEzLjc5ODU0Nj9uZWVkQWNjZXNzPXRydWVAQEAw
https://en.oxforddictionaries.com/definition/herd_mentality
https://www.psychologytoday.com/ca/blog/after-service/201705/the-science-behind-why-people-follow-the-crowd
https://psycnet.apa.org/record/1969-12889-001
https://www.teenvogue.com/story/psychologists-say-fandoms-are-amazing-for-your-mental-health