There is never going to be a substitute for face-to-face communication, but we have seen since the alphabet, to the telephone and now the Internet, that whenever people find a new way to communicate, they will flock to it.
I am only a sparrow amongst a great flock of sparrows.
In New York, if you weigh under 200 pounds and decline so much as a cookie at a co-worker's party, women will flock to your side, assuring you of your appealing physique. This is how skittish we are about the dangers of anorexia and the pressures of body image.
We used to flock to watch gladiators, public torture and executions. In more recent times, our appetite for mortal violence has been sublimated in sports, photorealistic video games, film and literature.
I don't think the Internet has replaced cities in any significant way, nor really could it. Cities are dynamic - and deeply seductive for the people who flock there - because they broker all sorts of fantastic and useful connections, cultural and economic and social.
Eagles don't flock, you have to find them one at a time.
Eagles commonly fly alone. They are crows, daws, and starlings that flock together.
Without tradition, art is a flock of sheep without a shepherd. Without innovation, it is a corpse.
Baseball guys tend to flock towards steaks.
If you've been told all your life that you're good-looking, people just flock around you and you never really have to try or have to learn an interesting craft, skill or hobby - or even have depth.