The Title is often spoken by those that make a decision based in perceived desperation. A person at the end of their rope, so to say, will be tempted to use faulty logic in an attempt to justify their actions. Unless you've lives in a 3rd world country under abusive conditions, you cannot imagine the deplorable environment humanity can survive in. A person living in the USA has a much different outlook on what deplorable signifies to them.
When the title statement is uttered, and the person isn't danger of losing life or limb, I have a very indifferent attitude towards their logic. There are times when it's both logical and decisive, but for the most part it's overused. The "Desperate Measures" you speak of will more than likely be based in revenge than in defense of yourself or loved ones. Let's be cognizant of our situation prior to utilizing a non beneficial tactic or plan. The results of such actions may be less than optimal.
We must also be aware that in the instance where you put someone into a situation of pure desperation, they may act out in an illogical or suicidal manner. When a person perceives that they have nothing to live for, they are a prime candidate for a mental breakdown or violent outburst. We are, after all, only human. When a person or organization decides to destroy someone's life or livelihood, you should be aware that those actions can have far reaching consequences beyond the intent of the protagonist. We call that "the rule of unintended consequences".
Considering the depths at which the human condition is capable of sliding to, add in a little mob rule into the equation and things can go off the rails fairly quickly. There is no greater threat to logic than an angry mob. Anonymity within that nameless pool of humanity allows normally pliant individuals to reveal deeply veiled hate and violence to flow without repercussions. Their idea of desperate measures is rather vague and has more to do with the will of the mob than the actual affront. Ferguson should be a shining example of those actions.
When we look at current events, we see people making choices based on a receding standard of desperate. What we, as informed citizens, don't want to do, is to push people into desperate action. That goes for the government, taxpayers, racial divisions, religions or even your neighbors. Instead of firing the lazy guy at work, let him know that he needs to find another job. Tell him you have enough evidence to fire him, but felt it would be in the best interest of everyone involved if he or she just left on their own. Today's faceless corporate mindset leads to acts of desperation for those of our society that have never dealt with adversity.
The sliding scale of desperation slips sharply as generations continue to relish in the false narrative that everyone is special. Participation trophy generations will soon be a large portion of the work force. When that happens I can see a significant slide of our moral obligations and seeing the corporate world continue to decline the talent level to the point that the more able and motivated will become the minority. Sometimes tough love is necessary. A little desperation can be
motivating, but if the person doesn't have the fortitude to endure, they
may turn to illogical actions.
In a defensive situation, you never want to encounter a person with nothing to lose. They act erratically and will not respond logically. The best situation is to allow that person an exit from your vicinity. My rule is never to get close enough to a perpetrator to allow them to touch me. You can also use your situational awareness to keep desperate people away from you. This can be as simple as not going places where people go when they are depressed or down on their luck. Casinos, Bars, Liquor stores, Payday advance, Title loan co's and red light district areas are all prone to have people with nothing to lose utilizing their services. Steer clear. You are tempting fate by frequenting businesses in those areas. Even a justified shooting can lead to arrest, loss of your firearm and permit, loss of time from work and much more. A threat avoided if far superior to a threat overcome. YOU have something, everything really, to lose in that situation. Don't allow a person with nothing to lose to put you in their situation by not using your head.