[notahacker]

I think the problems arise when you've moved beyond exaggerating putative customers' level of interest or how finished the software is to faking a solution which technical experts have very good reason to believe isn't actually achievable, or when your mistakes are likely to kill people. Often these two overlap, because when a solution is as important as life and death and the field is mature enough to actually have experts, you probably shouldn't assume the reason they didn't solve it was because their company culture wasn't as cool as yours.

That's why I'm somewhat more irritated about reading about an apparently very worthy electrical VTOL aircraft project featured on here boast of an apparently purely-hypothetical "300km range" on its website as if other engineers are just idiots for thinking battery weight might prevent that than I am about actually writing marketing material for people that have a lot more ability to solve problems than customers.