I have literally zero respect for anyone that opts out. There are NO logical reasons to opt out. It’s quite possibly the most selfish action anyone can do.
All the major religions and belief systems in the UK support the principles of organ donation and transplantation so that’s not a reason.
It is grossly offensive to even suggest medical staff will “let you die” just so they can get their hands on your organs.
Wanting your body in one piece. Well that certainly won’t happen if you have a post mortem to determine your cause of death.
Don’t want organs going to druggies or alcoholics. Firstly, nobody chooses to become an addict. It could happen to you or someone you love this year. Secondly, there are very strict criteria for these groups of patients to get on, and stay on, a transplant list.
Petty reaction to “the state”. Quite simply, grow up. You could save multiple lives and vastly improve quality of life for multiple people, but you won’t because “it’s the principle of it”.