While there may be some validity to this, it would hold more water if the same people walking by were the same group for both scenarios.
I've got a little tidbit for you.
Quite a few years ago; I was walking up one night to a local store and when I was walking up, I noticed three your "gentlemen" standing around in the little parking lot.
As I was leaving, all three "gentlemen" were making some really sexual comments to any woman that walked by, regardless of age.
I got home, 2 1/2 blocks away, and called our local Police Department. Explained what was happening and when asked for a description, I told them the approximate age, what they were wearing, and when asked for their ethinicity, I said that two appeared to be Black and 1 Hispanic.
Police came, arrested all three "gentlemen", and in the process it was reported that all three began fighting with the Police and kicked out a window of one the Police cars.
A few months later I got a phone call from a Prosecuter and was asked if I coiuld come down and give a statement.
I said sure and set an appointment. Went to the office and recounted my recollection of the incident.
The Prosecuter then told me that the "gentlemen's: lawyer wanted to know if I would answer a few questions; but that I didn't have to, if I didn't want to.
I told him that I had no problem with it and he had his secretary send in the lawyer.
This guy walks in and sees me.

6ft white guy, dressed all in black, with long hair and a beard down to mid chest.
Asked a few questions and then the ball dropped.
He wanted to know if I would know why the dispatcher said that I had called in that 3 black kids were harrassing white women, as they walked by.
I told him that I would have no idea why the dispatcher would say so; because I reported that the 3 were making rude comments to any woman that passes by.
The the ball hit the floor; because his very next question was:
"Did it make a difference to you, that 2 of the boys were black and 1 was mexican."
Looked him dead in the eye and said: "NO; because I was married to a Hispanic woman, had relatives that were both Mexican and Black and mixed".
He shut his case, said thank you, and then left.
Looked over at the Prosecuter, with a "what the fuck" look on my face, and he was holding his head in his hand, like this --->

When he finally looked up, he was smiling and shaking his head.
He said that he knew their Attorney was going to try and place the race card; but he couldn't say anything to me about it.
We started talking about my little town being kind of small and everyone pretty much knowing where everyone else lived or how to find someone.
He said that he would make sure that all three defendents were aware that if I received any problems, that they would be the first ones that would be thought of.
With that I left.
About a month later I received a phone call from the Prosecuter and he said all three had taken the offered plea bargain and to call him if I had any problems with anything that might be connected to this.
There were a lot of people that saw what was going on and I'm the only one that took a stand and said anything and the first thing that is tried, is to make it look like I'm some kind of racist.