What’s currently the best way to unbind a data-action event?
I have no idea if it is a good practice or not but here is a pattern that I have used recently.
Rather than updating the html to remove the specific string in the data-action attribute, I define in my controller a preventThisAction boolean state variable.
Then before doing anything in my action I check this value and return immediately if the action is disabled.
Here is a little example (inspired by a previous example of @javan 
)
https://jsfiddle.net/adrienpoly/gLz7pfu5/4/
I have not tested to remove the action from the Html, I suppose it would work, it is just too painful to manage (IMHO) when you have several actions.
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