There will be no tanks,

despite the continued media romanticizing of a bunch of bored, mostly well-off kids who have no place better to go. They'll get tired when it gets too uncomfortable, and most of them will go home.

Even the idea of comparing this bong party to what happened in Tienamen indicates considerable intellectual bankruptcy.

As for polls, here's the Time Magazine onethat got so much play. Note the wording of the questions:

Q8. On another issue, is your opinion of the Tea Party movement very favorable, somewhat favorable, somewhat unfavorable, very unfavorable, or don’t you know enough about the Tea Party to have an opinion?

Q11. In the past few days, a group of protestors has been gathering on Wall Street in New York City and some other cities to protest policies which they say favor the rich, the government’s bank bailout, and the influence of money in our political system. Is your opinion of these protests very favorable, somewhat favorable, somewhat unfavorable, very unfavorable, or don’t you know enough about the protests to have an opinion?

As you can see, one of the questions has been somewhat pre-cooked to encourage a particular response from someone unfamiliar with the movements.

A more balanced set of questions and results from Gallup.

Note the large percentage of people who don't really pay much attention to either of them.