The keyword report will be a good one to make, but it might also be misused since there are some commonly used words and phrases here on the forum. If such a word happens to be the keyword for the report, you might also end up reporting a thread that has good value to share with the community.
I don’t understand what you mean by a keyword ban like a ban placed on a particular word for some minutes before they are released? I don’t think that’s right, what if other members wants to use that same word in another discussion? Wouldn’t that hindered the decentralization of this forum?
A keyword ban can be placed only for keywords that are being used in that specific section for spamming projects such as the instance we are seeing here, it shouldn't be a common keyword that any user might use and mods can evaluate the spamming before they place the ban in place, and the reports should provide a suggestion to mods that they can use for their evaluation process.