This page was initially made as a joke in response to a forum member's joke on the All-Karate.com web site. We assume the joke was inspired by the sudden proliferation of advertising for 7most.com on All-Karate.com. We want to show a sense of humor, and we really do appreciate the joke (although the person obviously hasn't read the book).
Contrary to what the joke implies, and in contrast to the pretty images used to promote 7most.com, the "7 Most Effective Self Defense Techniques" website is not about scenario-based, if he does this, you do that nonsense.
In fact, it doesn't even list any "likely" ways to be attacked, because all of this is utterly useless when the going gets tough, the adrenaline rushes through your bloodstream, and there is no time to remember complicated martial arts techniques.
There are no "escape from bear hug" or similar techniques here for unlikely and unrealistic scenarios. If you're looking for "escape from hold #27" type advice, look elsewhere.
If you need the facts, go to 7most.com for the only principles and techniques you'll ever need to successfully defend yourself in a violent situation.