Well, yes, it rather does in this litigious society. It tends to demonstrate at least some degree of confidence in the information being provided when the risk of it being wrong is potentially great.
The referenced article was published in 2007 when society was less litigious than it is today. Just posting something doesn't add credibility to what was posted nor does it protect them from litigation should someone follow the advice and get injured or killed.
Again I restate: How many people giving this reckless advice would be willing to grab ground with one hand and the exposed part of a screw driver while discharging a 2nd anode. I bet none would.