I like the idea of providing such a list for testing purposes. I also like the idea of storing these as Base64, so you don't trigger issues by accident.

However, I also imagine how such a list could be misused to actually decrease the security of a system:

Imagine this list is handled the same way as virus signatures in so-called anti-virus software. Instead of properly handling user input, an application would check against this list and call itself "secure". Maybe with with partial and/or fuzzy comparison. If you demonstrate that this approach is deeply flawed by showing another unsafe input, they'd simply add that to the list and call themselves "secured" against this attack.