To be honest most japanese apperciate the effort if you try and talk to them in japanese. The reason they dont reply often is because as said above, they feel embarrassed they cant do the same.

But like every nation there are still assholes.

As to the other issues, possible JP players don't have an Arabic keyboard, too. (Yes, our Alphabet letters are called Arabic). I certainly don't have a Kanji one and I'm hoping to study Japanese when I have a little extra money for classes.
Actually japanese keyboards also use the QWERTY layout of western keyboards. Also there are no kanji keys. You write kanji the exact same way as on a western keyboard with microsofts IME - type the hiragana and press spacebar to swap to kanji/katakana. The normal keys double up as hiragana keys so you can switch modes by pressing a button (so Q>た W>て E>い R>す T>か etc), but to be honest most of my friends just use it like a western keyboard's IME (type tsu and it comes up つ) anyway.

Edit: beaten by bungiefan