[Dalewyn]

Safest speed is maintaining the same speed as the traffic around you.

Deliberately driving at a faster or slower speed than traffic for no good reason is the definition of unsafe driving. Please surrender your driver's license before you kill someone with that attitude.

[pfannkuchen]

I don’t think they are being serious, they are playing the role of an inconsiderate person.

[Dalewyn]

If it was sarcasm, well, sarcasm travels through the intertubez very poorly. :V

My sentiment remains nonetheless: Anyone who deliberately breaks the flow of traffic for no good reason is a danger to other drivers.