I wonder if firing on an in-game planet would be possible for cryptic, like for some future FE or something?

Sure, we could set something like that up. But it would have to be a special map. And really, you'd be targetting an invisible critter that we set at the point on the surface that you should be firing at.

And then later on an update to critter AIs causes an unexpected side-effect... so people who run the mission and start firing on the planet sit in amazement as the planet runs away.

Or Tricobalt Knocks the planet out of targeting distance.

Worse than that, it might Fight Back.

Or even worse, the planet rushes your ship and one-shots you with a giant bat'leth.

Or the tactical cube's invisible torpedoes in Elite Stf's

Seriously though, I'd love to see a "bombard planet" mission for the Klingons. If there wasn't one already, I don't remember.

As much as the thought of turning a planet into a wasteland of smoldering buildings and corpses appeals to me, what about the loot... err their valuable stuff. You´ll destroy it all. :p

It could certainly make the Dilithium Mining mission more enjoyable - fly your ship over to the asteroid and bombard it into crystals. Hoover it up. Profit! :p