Excellent. Thank you very much!
I’ve just tried it and works great!
This script hides the expanded reactions picker on an Overgrow forum website by injecting CSS code to make the reactions picker element invisible when it is expanded. This prevents a user from reacting to posts with anything other than Like and disables the reaction picker on mouse over.
@zephyr, here is the repository, please read Installation instructions to install TamperMonkey and the script.