Mod the Freelancer to make yourself invulnerable, get yourself some huge guns, and start shooting (concentrate on the Bounty Hunters). Or, do the GTA thingy...
Another thing you could do is take a medim-size hammer, find a soon-to-be-demolished building, and start slamming. If lacking a building, take a bunch of rocks, or some anvil or something.
Next up -- run around in circles and scream real loud. (if your neighbours are edgy, then I'm j/k)
Start breaking the ice that accumulated inside your refridgerator (if any)
Take a huge stack of glass bottles, go to a dead end street and slam the bottles on the wall...
Or, just write about what pisses you off, and what would you like to do about it (like I did about that Daniel K. fella).
Have fun wreaking havoc for no good reason...
Careful what you wish... You might just get it.