start chromium without flash plugin

I am using chromium browser with pepperflashplugin on Debian Wheezy.

I want to disable flash plugin completely for one user on my machine, but allow it for another user (thus I don't want to uninstall flash plugin completely).

When I go to chrome://plugins and disable Adobe Flash Player ad restart chromium, I can still see with ps that chromium is running with flash activated:

$ ps | grep flash
/usr/lib/chromium/chromium --ppapi-flash-path=/usr/lib/pepperflashplugin-nonfree/libpepflashplayer.so --ppapi-flash-version=16.0.0.305

It seems to me, chrome://plugins does not really disable it, but rather "hides" it.

How can I start chromium without flash plugin?

I would like chromium to behave as if flash plugin was not installed at all. One idea was to chown and chmod the binary /usr/lib/pepperflashplugin-nonfree/libpepflashplayer.so so that only root and the one user can read it (640). But that seems like a dirty hack. Is there a better way?