Safest way to go.
Expiration for (witness) votes is coming with HF25.
We already talked about expiration for delegation. This should be implemented post-HF5 with automated actions.
PS: Why burn your funds when dying instead of giving them to a charity (or to me 😀)?
By nature, a death has to be testified by a 3red Party. That means it's critically important to never create an incentive structure around it - like never. It's a pandora's box, don't open it.
cheers !BEER