Blind have all senses other than sight, so, they can also make up things depending on what they have heard, smelled, tasted, and realized through touch. Because of the absence of one sense, they may have more awareness than us. Remember Helen Keller.
Just because some deceive does not mean automatically that all do. The link I sent did have some examples of corroborated visual experiences. But, hell, in a reality where wealth is often espoused as a path to happiness, I realize that many researchers may misrepresent data in the hope of gaining future grants. Also, I realize that as a strong atheist, it may be currently impossible for you to accept the possibility of spiritual experiences as a valid explanation for certain events. In fact, based on the nature of most of your posts here, I would understand that even if you did have what many, like myself, define as spiritual experiences, you would define it as a temporary delusion of your brain. I was an agnostic atheist before my experiences made me start researching religion more deeply and it took extreme experiences to make the switch to the other side. Even then, my switch only fully accepted nondualism while just remaining open-minded about many other properties of religions.
I am certainly not here to define my POV as the only possible reality. I fully accept some other, even materially based, explanations of my spiritual experiences as potentially valid explanations. I try to avoid what many churches do by claiming their view to be the only valid view of God. Even many proponents of science may be doing this now with the practice of scientism which claims empirical data is the only form through which truth can arrive.
Since one needs to observe or experience events to know if they are 'real' the latter point is valid but many proponents of science automatically dismiss or even deny the reality of experiences that arrive through mediums that do not solely represent the physically empirical senses. Science may be searching for answers to the mysteries of life but is only looking in one half of the field. When one automatically denies the veracity of data presented by another because one does believe it though, one is limiting one's and perhaps even others' ability to learn more about the reality we all share. Still, I personally think most information most people have of even their physical reality is based on the belief of another, not personal experience. Each new generation is told by family, school, and society what is 'true'. Children are taught what the right behavior, action, and even belief is. If they trust the teachers, they do not test the statements to prove them through experience. It takes actual experience to deviate from what our cultures tell us is the truth. In fact, sometimes I wonder if change in belief is actually triggered only by the positivity or negativity of our emotional feelings during experiences that challenge our existing beliefs.