About driving slow in a fast lane: technically, here in Croatia on open highway all lanes except the rightmost one are meant for overtaking (and so, theoretically, one could be fined for driving in left lane if not faster than those in the right one, or if the right lane is empty). One is certainly expected to move to the right if a faster car is seen in the rearview mirror. Overtaking from the right is strictly forbidden. OTOH, in the city all lanes of a multilane street are treated equally.

I think that using a high beam on left lane hoggers is legitimate and should not be punished by rebooting one's empeg