zlacker

>>1317+(OP)
This reminds me of exploits we used to do to arcade cabinets back in Sydney in the 80's and 90s. The school gas heaters used to have what we called "clickers", piezoelectric ignition devices you could remove from the heaters.

You then took that clicker to your local arcade, and clicked one of the corners of the CRT, that would send a shock through the system and add credits to your game. I believe this was because the CRT was grounded on the same ground lines that the mechanism for physically checking a coin had gone through the system.

Suffice to say, they caught onto this over time, and added some form of an alarm into it. But up until then... Those were truly the best times.

>>intoth+k4
This trick worked in Telefonica's phone booths in Spain in the 90s too :-)

>>luisme+Wg
I remember when Verizon phone booths in the US started accepting the credit cards, for a while they would accept any 16-digit number with a valid IIN that passed the Luhn check.

>>zxexz+Zt
Toronto’s parking meter boxes were like this. They just had GPRS so they’d do an overnight dump (possibly a part of their data deal with the telecom back when data was actually saturated during the day).

So people were using cancelled or empty prepaid visa/mastercards.

Initially they’d just push out blacklists.

Once they really caught on, they did a firmware upgrade to do online verification and it took fooooreeeeveeeeerrrrr to do a credit card purchase.