The feature isn't easy to find but you can limit a hashtag search to tweets near you. On the results page, click on "More Options" and select "Near You."
That requires people to understand context and nuance.
We live in a world where a guy wants to ban Mel Brooks' The Producers because he doesn't realize it's a satire of Hitler, not an homage. Lots of people don't or won't appreciate context.
While I don't entirely disagree, I wonder how you would run that sort of experiment. I've been on the interviewing side of the hiring table and if someone had brought up politics—either side—I would probably leave with a sour taste in my mouth. Bringing up a politics in such an unprompted and unprofessional fashion is a big red flag, whether I agree with their stance or not.
How does shunning someone for their political beliefs help advance your own beliefs?
Seriously.
Refusing to professionally engage with someone due to private political beliefs will do nothing but strengthen the resolve behind that belief. Instead of stepping across the battle lines into your exalted realm of enlightenment, they will circle the wagons and reload the muskets.
What if Tolkien had refused to befriend CS Lewis due to Lewis' atheism? Lewis would've remained an atheist all his life. Instead, through their friendship, Tolkien brought Lewis over, leading him to write one of the most influential texts in evangelical Christianity ever published.
This incident reminds me of growing up as the son of an oil company's PR man in the Bay Area.
We lived in one of the small towns in the North Bay. My father handled public and government relations for the oil refinery in that small town. A contingent of the opposition was especially vocal in their distaste for the plant.
An orthodontist refused to take me on as a patient due to my father's job. Snide remarks from teachers were normal (but the school district relied on the refinery's charitable contributions—which my father controlled—so they had to play nice). Parents telling their kids they couldn't hang out at our house.
There is a certain type of extremist who is unable to separate public and private lives and believes attacks on both are equally valid in advancing their agendas.