Steve Lawson, False Teachers, and Works Based Righteousness

Most people who hold to a Calvinistic view of salvation probably think they have rejected works-based righteousness. But when sin is revealed in a leader, why do so many turn to that man's works to assure themselves that he is truly saved? This was the response of many when Steve Lawson was removed from office. And in the last sermon he preached before his removal, this was Steve Lawson's defense of himself as well.
Scripture teaches us that we can have assurance of salvation. But it warns us that even though we can examine our inward motivations, we are susceptible to deceiving ourselves (Philippians 2:12-13, I Corinthians 11:28-32). When it comes to other people, scripture is very clear, we can NEVER be assured of someone else's salvation in the same way. But more importantly, scripture teaches that while those who have been saved still sin, those who walk in sin or practice sin, ARE NOT saved. (Galatians 5:16-24, I John 1:16). To say it a different way, we can be more assured that someone else is NOT saved than that they are. And this bothers many people.
In his last sermon, which was on John the Baptist, Steve Lawson suddenly says the following: "And you should not judge a man by his one weak moment you need to look at the whole body of his work you need to look at his whole message. You need to look at his whole ministry and don't judge him on one hiccup that happens." And while you may disagree that this statement was connected to what was about to happen to Steve Lawson and his ministry, it is a perfect example of how he was defended by many.
So here's the question: how susceptible are you to a work-based righteousness defense of salvation