Q: Is it going to be annoying?

A: I did the max to make it no-annoying, but if it's annoying for you: Check the config and the keybinds and use them 

OR There is a really good config (by default it is on ON/True) that will make you see the structure message only one time per structure. After the first time visiting the structure you will never see it again.

But what if I want that setting disable? don't worry beacause if it's disable when you see the message of a structure (Structure A) you have to leave the structure, enter a different one (Structure B), and re-enter the other structure (Structure A) to see again the name. So now if someone lives in one structure it will not bother

Q: Can I suggest something? 

A: Please, yes.

Q: Can I add this to my modpack.

A: Go ahead!

Go to your config folder, structurecredits-config.json and you will see this:

{
  "active": true,
  "showOnlyOneTime": true,
  "chatMessage": false,
  "customStructureName": {
    "minecraft:swamp_hut": "a_cat:cat_hut"
  },
  "dontShowAll": [
    "minecraft:",
    "dimdungeons:"
  ],
  "dontShow": [
    "minecraft:plains_village",
    "minecraft:desert_village"
  ]
}

Plus, there is an in-game keybind that you can assign to deactivate all messages