Opps...

Realised I am getting too fluent with my 日本語,
that I said outright,'だめですね。'
to a middle-age man when he asked me,'だめですか？'
I should have sounded more polite,
'あ・・・そうですね。ここで書くようになっておりますが・・・'
with a very sorry look.

Guess I am just too fed-up with them random people...