Things you can do in KSP that no real space program would be stupid enough to try . .

[DisarmingBaton5]

Erm... How about the heyday everyone had with the SRBs after seats were added?

[hebdomad]

After a multi year, multi landing, interplanetary mission.... Doing a soft landing at KSP (with rockets only), nose first. Because landing the right way up is for chumps...

Edited September 17, 2013 by hebdomad

[Captain Sierra]

Launching 200 tons of megatug all at once.

[NGTOne]

No saying "Why?" or "How much?", but instead... "When?"

[Merinsan]

Jumping into the exhaust of a Mainsail engine as a method to get into a Munar orbit.

[pluto101]

"Yeah, that rocket design is efficient, but it doesn't look very rocket-y. Let's make it longer, and take out some of the staging."

[thereaverofdarkness]

Saving time by waiting until 500m altitude to release the parachutes (great for very brief stops because the Kerbals don't need a potty break after that).

Suggesting that the most fuel-efficient way to circularize your mün orbit is to perform a careful lithobraking maneuver because it not only decreases your orbital velocity but also reduces the mass of your spacecraft, making it require less fuel to complete the circularization again.

[AletzN1]

"The landing was a disaster, the ascent stage was almost destroyed. But he was able to EVA to orbit, and rendezvous with the nearest space station."

[nhnifong]

Aerobrake a space station in the atmosphere of a gas giant.

[bonyetty]

It has been said that landing on your head from orbit is good for death prevention. Ok that sounds fun lets try it, and if that don't work LETS TRY IT AGAIN.

[Whackjob]

*scratches chin*

I had to decide which of my creations to post by random number generator.

[Jarnis]

That seems... tall...

[phyrex999]

Getting all the way to Laythe and realizing after you land your two brave Kerbals on the planets surface, you forgot to put a ladder on your lander...

Edited September 18, 2013 by phyrex999

[Whackjob]

That seems... tall...

Someone in a thread once made the claim that you couldn't make a rocket 4 or so orange tanks high without distortion ripping it apart on launch. I took issue with that claim. I built that thing, then I launched it. That specific picture was earlier in its build. Here it is, again, with the finalized external trussing, plus on its way up.

It did not achieve orbit. Moreover, it did eventually hot-dog enough to shear apart in the mid. That's more out of laziness on my part. The external trussing was sloppy, you see.

[manskal]

Sending Jeb to the Mun with only a seat strapped on to a small rocket as the ascent stage. Totally worked out fine. Except for the "getting back home" part.

Jeb :"Uhh, KSC, we have a problem. I've finished all onboard snacks and it looks like I'll be here for a while".

Next mission: Munar snacks delivery! (Probably not going to retrieve Jeb, he likes it there).

[Goldham]

We should send up completely inpractical space fighters because Jeb wants to reenact Kerbal Wars.

[Thiagobs]

"Assemble it in orbit? Who assembles space stations in orbit anyway? We don't have time for that, just strap more SRBs and send the darn thing up!"

It wobbled so much that I had to rename it "Saturday Night Fever Station"....

[AntonioAJC]

"Success! We have finally landed on Mün!"

"Sir, we are getting reports that the lander has run out of fuel and cannot return."

"... Y'know what? Send a crap load of landers to the same site. We're building a lunar base everyone! Saddle up!"

[DisarmingBaton5]

KSP wants to accomplish a simple rendezvous and do some Gemini-style formation flying in LKO...

Build a 4 stage 3m rocket with 1 man and launch it twice! Formation flying over Moho!

[DrStalker]

Jeb: OK, so I was thinking about how we can't use aerobraking on the Mun and I came up with a solution. Two words: Lithobreaking!

Bill: That's only one word. And I think you meant lithobraking, not lithobreaking.

Bob: Well, if picky semantic arguments are the biggest objection anyone has I think we just found our new mission plan!

[SteevyT]

This

[Whackjob]

Or this

[Rage097]

Launch probes straight into the sun...for science...

[magnemoe]

[DisarmingBaton5]

I think this thread may be more appropriately titled, "Whackjob roulette."