You want to be mean? Throw the false-religion of political correctness out the window and never back down from the truth. People will soon avoid you like the plague for fear of your meanness in holding up a mirror to their idiocy. Very few people want to see reality anymore. Open their eyes and break their hearts - possibly their minds as well. The downside is they will quickly gang up to discredit you as a collective defense against the affront to their thin facade of sh*t.
Or, you could enjoy your natural habit toward niceness and order and not get too close to the flames.