Enforce title text

Hi, I have made a line of text using the actionbar title command. In this case, it is important, that noone removes this text. I have put multiple repeating command blocks into the world, but you can still simply put one repeating command block with a blank actionbar (" ") and the text will get overwritten/deleted. Can anyone think of a way to keep a text on the screen nomatter what? Thanks as always 🙂