what happen if we load white list to the player are already connected but don't have the permission ?

I think what will happen is that it will restrict them rejoining the server once the log off, I dont think it will kick players who are already on when you install the plugin, As the wipe is on this week why not wait till the server is empty (updating) and then install it ?,

hum, no need, what i would like is kick player online that not have the permissions and keep the ones who have permission