[linsomniac]

In our case, implementing a pay for call, or even an account number would have been fairly hard, as an 8 person company. MOST people respected it, and on top of it there were a few cases where people used it to our benefit.

So, it was definitely a judgment call about if we should add something requiring a special code for access, charging, etc... In this case, we had to make the judgment call about implementing something like this, or stopping public NTP service.

Part of the equation also included that pool.ntp.org was now available and fairly well populated, when we started offering NTP service it wasn't a thing.