For most people, the logic of driving normally calls for you to stay in your lane at all times. Standard roads normally call for you to drive on the right lane, although some countries like Hongkong and London use the left line for right of lane privileges.
But when you find yourself in the long stretches such as freeways and the highway, the temptation to change lanes will always be there. But before you do change lanes, make sure you do it the right way by looking for vehicles at the back using your rear view mirror and again a glimpse when you are about to change lanes. Use the signal lights or hand signals so that vehicles behind you will know that you will be changing your lane.
The frequency of changing lanes should be properly done though. There are some drivers who always feel that they should be always first. To do so, overtaking cars means a big thing even if they would normally reach their point of destination at any rate.
A word of caution to people who drive frantically though. If you recklessly drive like a lunatic, chances are you may be apprehended for reckless driving or even encounter accidents. High speed accidents are no joke and if you are not careful, you may find yourself in a life threatening predicament.
A driver can drive as fast as they want. Just make sure you follow the right driving ethics and keep your concentration and eyes on the road. The manner of driving is entirely up to you.