For me, it was that the Internet never forgets and that you should never enter your real name. In my opinion, both of these rules are now completely ignored.
Don’t pick up the phone if someone is online… I’m old
I’m a millennial, I learned this, and now I just don’t pick up the phone.
The modem made noises when connecting, but if someone picked up the phone, your internet would just stop working and they’d get their dial tone.
Now dot matrix printers, those were real pterodactyl sounds.
Modems also make noises when connected. However, the noise of them connecting is more distinctive because they go through a handshake where you can hear distinct tones, but then negotiate a higher baud rate involving modulation of many different frequencies, at which point to the human ear it is indistinguishable from white noise (a sort of loud hissing). If you pick up the phone while the modem is connected at a higher baud rate (post the handshake), you’ll hear the hissing, and then eventually you picking up the phone will have caused too many errors for the connection to be sustained (due to introducing noise on the line), causing both ends to hang up. You’ll then hear the normal tone you hear when the called party has hung up the line.
