Many asked why runners would start in the back in that thread and I explained the easy answer (think like a cheater).
If you start near the back you'll never see those people when the race is over, they're still running.
If you start near the front and obviously can't maintain pace the whole way, many at that pace will remember you when you drop off and will know 100% that you never passed them again. But...cheaters suddenly show up in front of runners late in the race who never saw them from very early in the race till that point. They simply deny and claim that they were ahead of them.
Many think these people are "smart"...they aren't. Wear sunglasses and a hat and have on nothing flashy. Don't talk with other runners during the race, ever. If someone sees you veer off, play the potty break role.
When questioned, deny, deny, deny. Think Rob Sloan who allegedly ended up finally confessing. When his GPS watch showed him running 35 mph, the speed of a bus, he said that a GPS won't work on a bus to which the interviewer said you could have had it near the window.
People on the bus saw him with his tattoo down his calf. His answer, "It wasn't me".
Cheaters are only cheating themselves and always have an excuse. Don't let them consume your life, they're miserable inside and crave there own self-fabricated attention. In the end, they'll always know what they did and anyone who understands racing and splits does too.
Google Oscar Miranda. Does anyone actually think he ran 2:16 out of the blue and then decided to not race anymore? Cheaters will always be cheaters.