I used to give blood, and have even gone through plasmapheresis (donating plasma and platelets only). I have a very rare blood type, and for a while it was much in demand.
But ever since the last time, I've not wanted to go anywhere near a blood donation site. The people were rude, officious, and generally treated me as if I were an imposition on their valuable time rather than a person.
"I am not a number, I am a free man!" -- Patrick MacGoohan, as "The Prisoner / Number Six"
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The mere fact that science may not yet adequately explain an object, event, or experience does not mean the immediate explanation should automatically default to a conspiratorial, extraterrestrial, paranormal, or supernatural cause.