Jack Johnson is asking his fans to surrender their privacy and security by handing over passwords.
The account was hacked after Silverman branded Bernie-or-Bust supporters 'ridiculous'.
The breach comes days after The Hague ruled in favour of the Philippines over the South China Sea dispute.
Anonymous often post similar warnings - but do they actually back them up?
Anonymous hacktivists claimed the cyberattack was part of its OpAfrica campaign.
The demonstrations are set to take place across the US on 15 July.
WikiLeaks' website was taken offline with a DDoS attack amid an ongoing hacker feud.
Hacktivists linked with Anonymous 'declared war' on Turkey in December 2015.
If found guilty under US law, Love faces up to 99 years in prison and up to $9m in fines.
In March last year, Anonymous members met and elected its Board of Directors to lead their movement.
The cyberattacks coincide with the 30-day Operation Icarus campaign orchestrated by hacking group Anonymous.
The 16-year-old student breached websites in 87 separate countries, the Seoul Metropolitan Police revealed.
A hacktivist announced the plans on Twitter and launched a series of DDoS attacks against the SABC.
Branded with a fresh Fight Club-inspired title, Anonymous hackers have ramped up OpIcarus yet again.
The government plans to take 100,000 computers offline by 2017.
IBTimes UK looks into the underlying social structure of Anonymous and its various emerging branches.
IBTimes UK looks into the underlying social structure of Anonymous and its various emerging branches.
Anonymous posts video with photo, address and phone number of mother of boy who fell in Harambe's pit.
Collective is trading DDoS attacks for stock market reports to out firms that cheat.
A hacker claiming to be aligned with Anonymous has reportedly compromised data from Turkish hospitals.
Hacker has used DDoS attacks on a number of government websites in light of new 'anti-LGBT' law.
Hacktivist behind the latest attacks on banking institutions explains all about the Anonymous operation.