I believe he is referring to this thread:
Where he decided it was a good idea to publically release details of where he lives and what specific location within that city he will be visting regularly on a certain day. Apparently his parents haven't taught him not to give personal details out online and so Leon mentioned that's not the greatest idea.
After that Adar Ree posted " /me hires a hitman " obviously not being serious. Then Khris gets himself banned for posting things like:
"wha?!!!! you very bad.im scared.waaaaaaaahhhhhhhhhhhhrrraaaaaaaaahhhhhhhhsniffle sniffle i tell my daddy you big bully.you no go to heaven.you bad"
So basically, what Syn said. No one actually threatened to kill him in RL unless he wants to report private DM's that say so.