Firefox and uBlock are non negotiable. PiHole is a good idea, make sure your DHCP vends out PiHole DNS to their phones, or set up their phones to VPN to your ho

Firefox and uBlock are non negotiable. PiHole is a good idea, make sure your DHCP vends out PiHole DNS to their phones, or set up their phones to VPN to your home so you can monitor traffic. You'd probably want to monitor that. You can also monitor their phones if you are the owner of their accounts. Probably a good idea to know all the callers for conversations over a few minutes. Gmail is probably as good of a choice as any. You would absolutely want to make every attempt to whitelist their phone calls. Ignoring unknown senders runs the risk of missing important calls, but taking unknown senders is guaranteed to make them prey for the latest scam. Password re-use is a scourge upon the elderly. Hard problem to solve because most methods work 95% percent of the time, but that 5% they don't is really painful. Some amount of education if you can impress it upon them is invaluable. _NEVER_ click links on an e-mail without asking you first is a good one. _NEVER_ use trans union or any money transfer service. _NEVER_ use a number or e-mail provided to you to contact a company, always google the right number and use that rather than what is sent in an e-mail. _NEVER_ click an attachment without asking you first.