Totally agree with you.

Yeah if sexual harassers would stop sexual harassing, it would be good for everyone, both for the victims (major problem) and for the people who are annoyed because they can't talk to as many people of a certain gender as they want (minor problem).

Sorry, Maybe I don't explain correctly, I have a lot of mistakes writting. My thoughts are that there are a lot of people that only want to find people from their same sex because they say in their descriptions that they don't want to flirt. I think that you don't have to reject people about your sexual conditions. I don't believe that in this communities of learners all the people from the opposite sex (or not opposite) want to flirt with you, they only want to learn. I hope you understand my thoughts.

"how other people think that they are 'victims' of this flirt" What do you mean with this? It sounds like you are denying the discomfort of being subjected to unwanted sexual advances through the excuse of language practice, I hope I've read it wrong.