It's crazy y'all are talking about this.I've blood let myself at home with blood bags when needed. It is only temporary but works , I don't get low iron or ferritin either because der always a decent level
Long-time member @maldorf drained his blood at home and a week later had a heart attack. I believe @BIGKIWI or another well known member also had the same thing happen.
I have no clue if there's causation or science behind it but knowing more than one member did it with dire consequences very shortly after makes it something I wouldn't try.