1. "upgrading" a Mopar Leaf spring design to a triangulated 4 link of any design
2. "upgrading" Mopar TB's with coils for a more "modern design"
3. Calling a wing a spoiler, and not knowing the difference
4. Misunderstanding that tires stop the car, and brakes stop the wheels
5. "upgrading" with no empirical evidence, from 9/16" TR to 11/16" TR
6. "upgrading" with LCA gussets
7. using the as a last ditch explanation for any "upgrade", "it can't hurt"
8. Hub Caps
9. Using frame connectors AND torque boxes
10. Installing rear swaybar without testing with a proper front bar FIRST
11. Asserting one item is responsible for positive improvement seen, when multiple changes where made
12. Failing to understand on a performance vehicle, " EVERYTHING EFFECTS EVERYTHING ELSE"

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.