I had a run in a long time back with that douche bag. I sent the information to @AusbitBank on twitter, but because Mark C. Bretl has a criminal record, his address is listed publicly along with his criminal record.
If he does not stop the harassment I would call the police and file a report. You are not entitled to threaten someones children.
Hear that you fucking piece of shit @noganoo?
As for the whales, @steemit, @dan, @ned, @jamesc, and others they should have removed Mark's account a long time ago for violating multiple terms of service.