Can having low blood pressure be fatal to life?

Spamming message boards about it can be.

Most doctors consider chronically low blood pressure dangerous only if it causes noticeable signs and symptoms, such as lightheadedness, fainting episodes, dehydration and unusual thirst, lack of concentration, blurred vision. Severely low blood pressure can possibly lead to serious heart attacks or neurological disorders. It can even deprive the brain and other vital organs of oxygen and nutrients eventually leading to shock that can be life threatening. Still, it's important to see your doctor if you experience any signs or symptoms of hypotension because they sometimes can point to more-serious problems. It can be helpful to keep a record of your symptoms, when they occur and what you were doing at the time. If you find time, dig out some research material online. There are plenty of such sites floating around. I usually check out for my dose of medical gyaan.