Yes. Australian federal police arrested Matthew Flannery aka Aush0k in 2013 claiming that he was the "leader of lulzsec". They even held a big press conference

Yes. Australian federal police arrested Matthew Flannery aka Aush0k in 2013 claiming that he was the "leader of lulzsec". They even held a big press conference about this, but in reality Flannery had been framed and never held any ties to lulzsec. This happened because a bunch of people had been defacing Australian government websites with messages from "Aush0k, the leader of lulzsec" in order to mess with him. Those mean hackers even defaced MIT.edu with his name (https://news.ycombinator.com/item?id=5098218 https://news.ycombinator.com/item?id=5098218) Flannery was later found guilty of some computer crimes, but not the ones for which he was initially jailed.