Seemingly so many don't do any homework. For example, this guy: There are cheap plastic knives for self defense that are as good as metal for the first use. An example of those would be the Cold Steel FGX Nightshade series.

this happens a lot in dc. riding the metro you see police making arrests with rows and rows of machetes and chefs knives being laid out like they’re for sale.

A rusty machete as well, nice!;)