A comment donation bank would be a website where people donate their comments with the understanding that other people will copy and past them various places on the Internet.
This is an idea I've been thinking about for a while. There is a lot of work involved in responding to the repeated bad ideas put forth by people who choose to remain ignorant. This website would exist to help reduce that work of fighting those bad ideas and misinformation by allowing people to keep repeating the same responses every time.
How I picture it working
Anyone will be able to make comment pages. Comment pages will have tags attached to them which help organize them. Tags will be for what the comment can be used to respond to. Some possible tags might be for things like nuclear waste, and nuclear proliferation threats, or responses to individual papers and websites. People can make their own tags or use tags that other people made. Comment pages will have their own comment section, a way to flag inappropriate or inaccurate comments, and a way to rate the usefulness of the comments to give feedback about how effective individual comments are in practice.