You're overreacting. If all the group of guys said "That's a lad dressed as a lass," I don't see the big deal. You were made. Check with any woman and you'll hear stories of derogatory comments and harassment. Earlier this year I watched a program where a woman was recorded by a co editor walking in front of her using a rear facing camera. It was an endless string of catcalls and lewd comments voiced by men. My wife had to endure a lot more just being an attractive young woman. All that the boys said was an observation which was accurate. It's really too bad you think could have been assaulted, if this or that happened at a different time of day. It seems the rest of your journey was uneventful.