I normally avoid these pissing contests about who knows who, but just out of curiosity I plugged Hackathorn's name into Google.
Now if this is the right guy, then I don't see how he could be pissed off about John giving his phone number out on discussion forums when he himself published in a public webpage both his office/fax and his mobile number.
http://www.criticalreaction.com/INSTRUCTORS/Hackathorn.htm
Critical Reaction Training, Inc.
Office/Fax: 262-677-4760 Mobil Phone: 262-844-7104
"Survival Through Advanced Training & Instinctive Reaction"
Ken Hackathorn
Tactical Handgun
Hackathorn believes it is crucial to be able to use the defensive handgun accurately while moving, from behind cover, twisting to the right or left and in other disadvantageous conditions. Students learn to perform good marksmanship while faced with a variety of challenges, the likes of which are rarely seen in formal training courses for either law enforcement or private citizens. Beyond moving and shooting, other topics include defenses for couples in which only one is armed, defense against a threat from behind, close-quarter defense and withdrawal while shooting, Hackathorn's own take on "point-shooting," low light handgun skills taught during a night-shoot, one-handed operation of the pistol, and numerous pointers for self-coaching in practice after the class.