I've learnt that through life you just get on with it. You're going to meet a lot of dishonest people along the line and you say good luck to them. I hope they live in comfort. Then I start sticking more pins in their effigies.
Trust me my runners aren't going to run one event while looking past it to the second event. When they get on the line for the 10K that's a do-or-die situation for them.