Hi!
Sorry if the feature is already present. I couldn't find any information about it.

So, what the idea:

Player can be sent a message when a certain event occurs. But, as I understand, it can be only one fixed string. And it's boring.
Replace this string with a list of strings, and message will be chosen randomly.

( U can also implement sending messages one by one from the list, but it may force u to create new variables for every messages list, so I don't think this is a good idea. )

rightclicks.json example:

[ { "block": "minecraft:crafting_table", "messages": [ "No", "Not now", "Never" ], "result": "deny" } ]

I'm familiar with programming a little bit, so I don't think that it's hard to implement or it could create some performance issues.