It's not an East Coast thing. I went to school in Massachusetts, and interviewed at schools in Maine and New Hampshire. Visited friends at Dartmouth, Brown, George Washington, American. Went to sports competitions at Whitman, Reed, Pacific, Gonzaga, Stanford (on the west coast). None of them are gated. Gating an entire college campus would make no fucking sense (except maybe in very rare exceptions). You seem to not understand how large many colleges and universities are.

Can you show some pictures or provide some examples or evidences of schools that are fully gated?