I'm aware of several parked domains that I'd sort of like. If they expire because their current owner decides to save the domain fees, I'll think about picking them up and using them.
In the case above the domain would no longer be interesting for spammers because the traffic would have died down, substantially increasing your chances of getting it for legit purposes.
It would also reduce the chances of expired domains being used for phishing.
I'm all for a grace period of a year after a domain has been owned by another party. Just like old phone numbers.