"Oh no I have to check a box instead of not checking a box I am so deceived."
Opt-in systems result in a massive number of lost organs due to status quo bias, as people who say they're in favour of organ donation just never feel like taking the step to change their status. Opt-out systems exploit that bias for good. Opting out is a trivial effort, and at least around here, the person's next-of-kin still has the ability to object and prevent their organs from being harvested regardless of their status (which was true under the opt-in system as well). If you want your organs to rot with you, you still very much have that option; nobody's forcing anything.
Only issue i see with an opt out is if you have a medical issue that can be passed on with organ donations (like HIV) and unaware the system is opt out, not in.
