i would go into the future, get a load of genetic manipulation equipment and learn to use it, then go back in time and use it on myself and make myself the most genetically advanced being possible
moral of this story: follow your own advise, don't get offended by the internet, do research before you try to push your opinions onto someone and, perhaps most importantly, don't excpect others to play by your rules on the internet.
i would go back in time and prevent the primitive homo sapiens from discovering the uses of fire, instead forcing them evolve in such a manner that they co-exist with the earth and don't destroy it
i'm the kind of person that people scream when they see me in bad lighting, and i do the stare thing... and i have long curly hair which is an automatic wierdo mark... and i also speak in monotone!