First, the movie starts with a scene during which people are going into their homes as the speakers in the streets proclaim the curfew that is now in effect "for their own good". Our government seems to think we need them to take care of us, and are trying to make laws "for our own good". This is tyranny.
Second, the media is controlled by the government (much like the Obama Administration would like to drown out dissenting views by force of law). At one point, in the television station, Evey asks a question of her co-worker, who replies, "our job is to report the news, not fabricate it; that's the government's job." Sound familiar when compared with the mainstream media?
Third, there is extreme government surveillance of citizens. Dissenters are found and dealt with (killed). Our government already has the means for this, and Obama is pushing for more power to control communication and spy on citizens.
The plot also brings to light the means by which the "chancellor" (read "dictator") came to power. Initially He was an extremist politician who gained support, won battles, gained more support, gained a militaristic following, and grew more power-hungry. In order for the people to see the need for a singular position of power, a crisis is needed. Enter the viral infections spawned by the government (swine flu, anyone). As 100,000 die, said politician "discovers" the antidote, which he really had all along, and the people elevate him to power.
The main character, V, echoes a thought of our founding fathers. The people should not be afraid of the government; the government should be afraid of the people. However, the people in this scenario have already been disarmed (it is Britain, after all). When the rioting for freedom and real change begin, and the people prepare to march on Parliament, an investigator asks the chief what he thinks will happen, to which the chief replies, "The same thing that happens any time people without guns try to take on people with guns."
Folks, this is a very real scenario. With Obama and his agenda, it becomes all the more real. The previous paragraph explains the necessity of the people maintaining firearms. We the people must call the government what it is before it is too late. We must make the media accoutable for bias instead of reporting. We must take responsibility for our own lives and our own freedom. W must make sure the government leaders know that WE THE PEOPLE are the United States, and that we wish for freedom to reign, and that we will not tolerate more encroachment on our lives "for our own good".
Now is the time. Tomorrow may be too late.