Completely agree. A simple rule of thumb is to treat everyone as guilty till proven innocent.

Proven innocent: close friends you'd trust with your children or your money, colleagues you've been through the crucible with (you know the measure of each other), YC and other small companies with a strong rep built over years and a simple management structure that isn't likely to be co-opted, etc.

Gut feeling = wishful thinking + rose-tinted glasses. Ignore it.