Centrifugal Force Can't Create "Gravity" In Rotating-Cylinder Spaceship

In several science programs and movies about the future space travel, there is presented an idea that, the gravity on the spaceship could be created by rotation of the drum-like spaceship. HA! For the centrifugal force to create "gravity", the body has to weigh something. In the gravityless space bodies have no weight. Therefore the rotation of the spaceship would be irrelevant to the weightless objects. You can see clearly how the idea is wrong on mathematical level. The equation for centrifugal force is F=mv2/r.

If m=0 then F=0 * v2/r,

F= 0 / r,

F= 0. So, unless there is gravity to start with, there is no way of "creating" it by rotation and "centrifugal force". If the space station rotated, it would rotate without you.