if there are invisible or unknown consequences for failure then Flipping a DP should be a requirement, to give the player the safety of knowing that your not being nasty, and that there will be opportunity for a good thing to happen in the future because they risked something now.

Sure, but remember that the dice are a contract, and the player has the right to refuse the roll if they don't like them odds. So sayeth Jay Little on the Order 66 podcast, amen. In that case, the PC may not know how much trouble he or she is in, but the player knows.

if there are invisible or unknown consequences for failure then Flipping a DP should be a requirement, to give the player the safety of knowing that your not being nasty, and that there will be opportunity for a good thing to happen in the future because they risked something now.

Sure, but remember that the dice are a contract, and the player has the right to refuse the roll if they don't like them odds. So sayeth Jay Little on the Order 66 podcast, amen. In that case, the PC may not know how much trouble he or she is in, but the player knows.

We do it differently at my table. If they want to do something, I describe to them the difficulty of the task, making sure to point out increased levels of danger and any environmental effects that may be hindering them. But once they aren't allowed to see the difficulty pool until they commit to the roll. It helps remove a lot of the meta. Rather than the PCs going "oh ****, three setback dice? I don't think I wanna risk that threat," they are aware that it's stormy and dark, and the controls of the speeder are slick with rain. My players and I agree that once the dice are in hand, there's no going back om rolling that roll.

Yeah, I almost always let my players choose to roll or not, even after seeing the difficulty. But once they've picked up the dice, that's their commitment. Then, Destiny Points can be spent

If a player ever refuses to roll the dice, then (to me) that's them saying they're okay with me arbitrating the outcome of the situation or resolving it through dice rolling of my own.