Ok. So you are quite ok for others in the public to be used for sexual purposes.
You seem to feel that because people don't quite understand what these people are doing, that it makes it ok. And that they might be just having a laugh.
And then what?
I do not 'fear' these people. I am not operating from a position of 'fear'. I am outraged that two people are dressed in outfits of sexual fetish wear are including other's who are innocent of their intention.
As I said, where does the line stop?
And I also question your 'most people don't know'. My teen is the one who alerted me to these costumes by telling me about 'furries' and 'doggies'. They were 14 at the time and these costumes were discussed with their peers as sexual fetish wear.
I suspect a whole lot more people are fully aware that this is sexual fetish wear than some people believe.