I imagine everyone who was a kid during the dial-up times has a horror story of being confronted with an enormous phone bill by their parents. I remember mine going mental at me for costing us £40 one month (normal service was iirc ~£10)
I was a teenager on the tail end of dialup, so no hourly fee, but my parents got awfully mad if I tied up our phone line all day playing online games. They’d randomly call home a few times a day to ensure compliance.
Good times. I built a wardialler out of one of those science fair 150 in one kits and an Atari st using an rs232 data line to bounce a relay. found plenty, but the fun ended when the 400 quid bill came in. Endless paper rounds.
i've backspaced over trying to be nice but i don't think you a) could've made the dtmf tones, b) matched the impedance, c) modulated the serial signal even if you made a connection
Accidently dialing an non-local number for AOL ended up getting me banned from the family PC for a month. Long distance charges were expensive. (US)
Then we were in Germany in the late 90s and even local calls cost money so one had to be wary of how many hours you were online. Eventually we got flat-rate and ISDN 64k and then 128k but it wasn't long after that we moved back to the US.
I discovered that my phone company had numbers in the same area code that were "medium distance". You dialed them like a local call and they were in the same area code, but they would inflate your phone bill in a hurry. It wasn't easy to figure out if a number would be in that zone either. I had to cancel my first ISP after getting the monster phone bill at the end of the month. Luckily they weren't full up long distance or it would have bankrupted me, also lucky that I only joined the ISP in the middle of the month.
Nah but really the bill wasn't bad enough for that, and honestly I'm not sure that kind of PR move was very common before social media days (total guess). I just remember it because I had to give my parents the difference and as a 12-13 year old that £30 was a lot!