For SSID's the one thing I would recommend is appending "_nomap" onto the name to opt-out of location service databases from Google, Microsoft and Apple.
„_nomap“ at the end of the SSID seems to only work for Apple and Google, Microsoft requires „optout“ to be present anywhere in the name [1].
So, the recommended opt-out change would be „SSID_optout_nomap“.
how do you know this will work at all?
No other way than taking their word for it [1]
> In late March 2024, Apple quietly updated its website to note that anyone can opt out of having the location of their wireless access points collected and shared by Apple — by appending “_nomap” to the end of the Wi-Fi access point’s name (SSID). Adding “_nomap” to your Wi-Fi network name also blocks Google from indexing its location.
> Asked about the changes, Apple said they have respected the “_nomap” flag on SSIDs for some time, but that this was only called out in a support article earlier this year.
[1] https://krebsonsecurity.com/2024/05/why-your-wi-fi-router-do...
Even worse, since the clients can't see the presence of the known network, the only way they have to connect is to continuously probe for the network (this is what reveals the SSID). Besides draining the battery faster, it's a massive privacy concern: imagine walking around with a megaphone announcing all the places you recently have been.