Okay... conduct in public, for the gays that might find it intimidating. Just BREATHE. It's not a big deal. I see some of my queer brothers get on and either look like they're carrying around wads of rolled up hundred-dollar bills, POUNDS of crack... in their systems, or like they're "posturing". My advice: Be Yourself. Don't let anyone change who you on the inside.
If you aren't a polite person, then don't be yourself... be nicer than usual, okay? M'kay. If you pass very closely to anyone, say, "Excuse me," or "Pardon me." Silence is a foul language when brushing along an unsuspecting sista' on the bus. I've seen UGLY things happen to folks that do this maneuver, when they can't speak a word of English. Tragic. If you ever ride the public transport in a foreign country, LEARN HOW TO EXCUSE YOURSELF! If you think there's greater safety in silence, guess again. If someone is going to mess with you, they'll find a reason to do so, so just be polite, well-mannered and above all, be yourself. Don't let fear distort the person you are within; don't let caution cast a shadow on a light that is meant to shine brightly. Also, I recommend (if you can remember) smiling. Some folks are in the same boat, or one with a leak. A smile can make a stranger's day and even make a stranger into a friend. It's easy to be an introvert, and many times it's preferable, but when you make an effort to put out good energy, you make yourself feel better and someone else, if you're lucky. If you take a chance and BOMB, get over it and try again with someone else. The gains outweigh your investment of a smile and a greeting.
Forget about never letting 'em see you cry. More importantly, NEVER let 'em steal your smile.