> At first it seems like you're a crazy person talking at others. But after a minute (though it'll feel like a little longer) most people will happily talk to you.
Yes - but if you watch very carefully you'll notice their eyes darting nervously about, trying to find the nearest exit, and a small frown appear as they attempt to calculate the whether staying in the line is worth it, and the likelihood of you attempting to sell them something or attempt violence if you make your excuses.
In other words - if some random guy starts talking to you in a line, you will tend to make small-talk in return. Whether you like it or not.