Yes I agree, also it depends on a player choices especially here at QA. In my case, I can make a choice to not to claim the win-on-time only if we do have a very good interesting game otherwise an immediate claim on time should be done. It's always feel good to play a very interesting good game whether you win or lose. Agree?
I have a game that the opponent has run out of time for a while [I can't remember how long ago] so I checked his games and it seems he has loads, over 20 waiting. So I clicked on the envelope to send him a reminder and it said "player noy found". As it's just a friendly game it's not imperative but it seems a bit mysterious to me.
In my case, I can make a choice to not to claim the win-on-time only if we do have a very good interesting game otherwise an immediate claim on time should be done. 
It's always feel good to play a very interesting good game whether you win or lose. Agree?