1) While I am sure there are cases of over-zealous cops, take a look at the number of times the cops just stand and take the abuse from over-zealous protestors. The latter far outwieghs the former.
2) What exactly cannot be published on the net????
3) Who is curbing your right to speak ill of politicians?
4) Who is restricting comments on politics from kids?
5) You have a right to protest, you do not have a right to do so whereever you choose and you are most certainly not guaranteed to get up in the face of those you want to protest against. They know you are there. But you do not have the right to force them to hear what you want to say.
sf
do you remember the shit they pulled on the vietnam protestors and are pulling on the iraq war protestors (except now they video tape protestors - i live in santa barbara county, ca - on of the more right wing parts of the nation)
check the news where editors of student newpapers have been told by their principals what they may not include - display of campaign material on campus or within sight of campus
ALL of your electronic communications are subject to monitoring
how to use simple items from your local supermarket, hardware store or hobby shop to make bombs or poison gases or simple land mines
or have you noticed that the spy satellites have improved to a great extent (even the commercial ones can show a lot)
how to live off of the grid
how to stay out of government databases
like how much money you can transfer without the financial institution being required to inform the government of the transfer
countermeasures that will prevent the government looking into your rooms without a warrant
things like 'backscatter' scanners or high resolution infrared recorders or scanners
yes, we live in a goldfish bowl, but there are ways to confound the government spying
the supremes have rulled that students under the age of 18 do not have most (if any) constitutional rights
but it is all for your own good in the name of national security...