Brown, you'll surely recall, is perhaps best known for beating up his girlfriend
Over the weekend Brown went back and forth with Johnson on Twitter. Things went so far off the rails so quickly for Brown that last night he deleted his Twitter account
Here's how the exchange began:
Within hours of that tweet Brown was off Twitter and Johnson was reporting a deluge of death threats:
emailed the author and photographer Paul Mutton, listed on Twitter as a "White Hat" who helps keep the site safe, to ask what Twitter protocol is when death threats are sent over the network to users.
"Twitter would certainly be entitled to suspend accounts that have been sending death threats, as this would constitute a violation of their terms of service," Mutton emailed. "However, given the vast number of Twitter users, I suspect this would only happen if a complaint is submitted via https://support.twitter.com/forms/abusiveuser."
We've tweeted to Johnson to find out if she's filed a formal complaint with Twitter and will update this post if we hear from her.
Meantime, many Twitter users have already weighed in with their own verdicts:
When do social network threats become offline security issues? That question is at the heart of a heated and vulgar Twitter exchange between pop singer Chris Brown and the writer and comedian Jenny Johnson.