Improve Gas Price input sanity checking. Use surrounding stations as a guide or verified prices. Errors checking too poor.
Don't accept prices "too far" outside local average. Use verified prices as correct. Build database of known good gas price input users, accept their numbers as correct. I am seeing 25% errors from price listed to pump price in some cases. This should be simple to improve. Maybe give points to first user for input and points to subsequent user when price is verified.
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Juvescent Joys commented
meh
penalize trust for wazer's poor reporting history