about 3 years ago - anonglitch - Direct link
Thank you for sharing, we all agree that this confirmation button or the undo option. I would bring it up to the developers and see where this goes. However, this was suggested before, unfortunately it was not something that was seen to improve the game. Due to the nature of all boosters would be flagged for any use and would make using multiple ones more tedious. Therefore we can suggest it again, but an answer had already been provided previously.  
about 3 years ago - Silmaril - Direct link
We put this to the developers last October @Pauly7. Their response was not conclusive and is still an open request.
Although the idea of a warning like this is liked, it would be quite complex to create across the Boosters, as not all would need this as many small 1-45 minute could at the very least be disregarded. Thoughts are that this could be useful for the longer Boosters, but only if 50% or more of the time would not be effectively wasted.
It was also felt that most of the community would also want the option to disable this as generally we are being asked to reduce pop up's by the community in general, with many players disabling all options in the game