The Next Web: Cryptography startup sues Black Hat conference after getting booed
 and heckled.
[1]https://thenextweb.com/hardfork/2019/08/26/cryptography-startup-suing-black-h
at-conference-organizers/

   Jim Bell's comment:

       "BOO !!!    HECKLE !!!!"

   (Sorry, couldn't resist...)

References

   1. https://thenextweb.com/hardfork/2019/08/26/cryptography-startup-suing-black-hat-conference-organizers/