Humour is difficult with all the different mother languages. I’m german and learned english at school which I left 15 years ago and since then all practice I’ve had was forums and youtube, basically. So what I got to know at school was high english with almost 5 of 8 years having an english teacher who studied and used to live in Oxford. American or british “slang” and all the regional differences are difficult to get sometimes, all above when some dry english humour comes into play. It often reads offensive but from the PMDG forum with several people coming from there I got used to the idea that they mean it differently from what I read into it. It might be MEANT offensive but I just tell myself it’s not and keep my good mood.
Other people who studied english as their second, third or nth language might struggle even more depending on how well they know the language. In this forum we automatically expect the language as the first world language and MS being an english speaking company but actually most people here might hardly be able to read the sense from a longer text, not to mention lingual humour. Add a total different script on top of that, cyrillic, hebrew, arabian, chinese, japanese etc etc and it gets confusing quickly. So as said above, stepping back, thinking twice and not reading offense into every second sentence would help a lot in the internet.