The proverbial grandparents will follow the instructions of the scammers and will click through all of that. We've had decades of empirical evidence: people will keep clicking and tapping on dialogue boxes to achieve their goal.
People have physically driven to cryptocurrency ATMs on the instructions of scammers:
* https://bc-cb.rcmp-grc.gc.ca/ViewPage.action?siteNodeId=2136...
* https://www.usatoday.com/story/money/2025/04/21/bitcoin-atm-...
Warning sheets will do nothing.