Now they have really gone too far - whoever they may be.
Last week, The Straits Times website was hacked.
Then the Prime Minister's Office and Istana websites were compromised.
But most shocking of all, Ridhwan Azman's Twitter and YouTube accounts were hacked.
It's shocking because I had no idea who Ridhwan Azman was. I had to Google him.
Being probably the only person in Singapore who didn't watch any of Jack Neo's two hugely popular Ah Boys To Men movies, I didn't know Ridhwan was a "star" of the films.
The 19-year-old was also in the news a few months ago for admitting to hitting his girlfriend and has since apologised.
Then after he tweeted "Halloween is over. Stop wearing stupid masks" and other insults with the hashtag 'anonymousSG'", someone claiming to be anonymousSG appeared to have compromised his Twitter account and uploaded a "retaliating" video on Ridhwan's YouTube channel.
So we have The Straits Times, the Prime Minister's Office, the Istana and a teenage movie actor.