alt Hacker News"Coordinated attack" might raise more than eyebrows with the legal departments of the companies you've called out.
>Over the next 27 hours, in four distinct waves, all of them tried to use my VoIP (SIP) server to place phone calls on my dime.
As you've clarified in your comment here the companies did not do this. Compromised machines on their networks, controlled by third parties did it.
The actual blog post clarifies this as well. But still in some sense these organizations share some level of responsibility if it is their machines, attacking from their ASN.