I may speak from a different perspective, but I attend events (dog shows) on a regular basis where there are literally THOUSANDS of intact dogs, including bitches in season. I can count on one hand the issues/confrontations I have seen in 20 years of attending such events.
The testicles or ovaries are not the problem. The one holding the leash is the problem, if there is one.
My intact dogs are well behaved and under control no matter where I take them. Point in fact, Milton just spent the weekend at the Charlotte 600 in the infield. He probably socialized with HUNDREDS of people. Big people, little people, kids, men, women, sober people, drunk people, loud people, you name it. Had a great time and made so many new friends for himself, and for his breed.