A taste of one's own medicine

An underground hacking forum was hacked by other hackers!
They got a taste of one's own medicine!

A sample of the unpleasantness that one has been giving other people.

Refs

• http://idioms.thefreedictionary.com/a+taste+of+own+medicine

idiom, 14-01-28 15:26, 14-01-28 15:26, Yosei