Maybe not a "crime" by the definition of the law, but a lot of things that aren't crimes, such as sexual harassment, are grounds for losing your job. If you display such behavior in public, you should be willing to face the consequences, especially if you work as a government (publicly-funded) employee.
> It's sad these vigilantes one day will also make fools of themselves, this is inevitable, one can hope the pitchforks will not come out for them, but they probably will.
I've heard this argument before. Despite what some people think, not everyone harbors racist, sexist, or otherwise wholly objectionable thoughts in the recesses of their mind and of those who do, certainly most of them know better than to spout such things to a public audience.