Debates over privacy have plagued Facebook for years.

But the news that the social network enabled Cambridge Analytica, a political data firm that worked on President Trump’s 2016 campaign, to gain access to private data has sparked an unusually strong reaction among its users. The hashtag #DeleteFacebook appeared more than 10,000 times on Twitter within a two-hour period on Wednesday, according to the analytics service ExportTweet.

Cher was one such deserter, writing on Twitter that the decision to quit Facebook, although “very hard,” was necessary because she loves the United States.

“2day I did something VERY HARD 4 me.Facebook has helped me with my Charity, &there are amazing young Ppl there.I have a special friend (Lauren)who I Respect & Admire,but today I deleted my Facebook account .
I Love My.
I Believe….There are Things MORE”IMPORTANT”THAN”

— Cher (@cher) March 21, 2018