Could become a sort of simple rule of thumb: for valious transfers, use legacy (base58) addresses with many uppercase characters at the start so they become more difficult to poison.
Your idea sounds great for OPSEC to proactively avoid Address poisoning attacks, but if I am only a normal Bitcoin user, not a programmer, I just think it's hard for me to intentionally create such addresses.
If I completely depend on the wallet software for address creation, I will have chance of getting such addresses, or not, or I will have to trigger the wallet software giving me many different addresses until one that is usable for me.
Legacy addresses, Nested Segwit addresses are case-sensitve.
Native Segwit addresses (bech32) are not case-sensitive.