Well, it's probably true. Although easier to confirm sometimes, information across the internet still is often a big game of telephone. Some people treat internet info like UDP and just accept what they get, some people are TCP and will fact check before accepting it.
This person probably did just hear it from a buddy.
Tasers aren't non deadly, they're less deadly. Because they can still kill in some circumstances. What exactly needs to be protected at the possible cost of a life here?