Russ, I know you're working on a challenge filter but as a stop-gap
could I'd like to make a suggestion.
Making the default setting 14 days for challenges and rematches
would mean that when a game came through with a 7 day timeout
you'd know that your opponent had actually chosen it - and would be
more likely to enforce it.
I've had lots of people tell me that they never bother changing
anything but the colour when they rematch - and many don't look that
closely at the options to see they have a choice.
Just and idea :-)
Rhymester