Ya'll sure spend a lot on Reddit ads, even my wife sees them, and she's not your target audience. Is this effective? honestly curious.
More granular targeting, especially for portable devices that will change WAN IP.
Yes, under any and all circumstances, this is the correct thing to do for safety and sanity.
When I get roped into doing "fix my computer" work for friends and family, it's also best to slap down a hosts blockfile. People get into some things I can't even imagine; it's like they're a one year-old sticking everything in sight in their mouths, just clicking on everything.