The one this poster was referring to was everyone suddenly becoming an armchair expert on how bridges should be able to withstand being hit by ships.

In general, you can ask any asshole on the internet (or in real life!) and they’ll be just brimming with ideas on how they can design roads better than the people who actually design roads. Typically those ideas usually just boil down to, “Everyone should get out of my way and I have right of way all the time,” though…