Hey res4, tell me why I MUST write my opinion in JAPANESE. Do you understand what YOU said? Do you know why you said like that?
You might say this site is for Japanese, therefore everybody should write in Japanese. But if you say so, I want to ask you that you never talk with Japanese friends of yours in English but in Japanese only? If one of them talks to you in English, do you ask him not to do like that?
You should talk to yourself and if you find a reasonable reason, tell me.