You're taking it too personally, but you knew that already. Sandbagging has a grand and glorious tradition. I would sandbag in a heartbeat in the event that I ever met someone who was actually slower than me. "I just had a heart valve replacement/finished chemotherapy/ressurection event caused by the zombie virus, so I know I'll suck at this ride", while passing everyone out there. Who knows, it could happen some day.
Now half-wheeling, that really ticks me off.
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Momento mori, amor fati.