Maybe, (it's just a guess based on your short quote) the author means that Garrett had other options, he could easily leave the neighborhood and move to another place. That's why he didn't care much about establishing good relationships with the neighbors and, thus, kept on being nosey, even at the risk of offending his neighbors. Unlike Garrett, the author had no opportunity of moving to another place, so he felt that he should resist the temptation to "look over the fences", just to be in his neighbors' good books.
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