1- I would kill every corrupt politician/powerful people on Earth
2- I would steal every bank, amass a hoard and give away the rest, probably destroying global economy.
3- I would destroy the FED, IMF, and other nasty organizations, bombing their buildings and/or killing their leaders.
4- I would enter Area 51 and other "secret'' facilities.
5- I would make thugs s**t themselves appearing as an "unknown force in the ghetto" while they're beating and/or stealing innocent people.

As you can see, quite a massacre. But believe me, it would all turn out just fine.