And even if you spent a minute explaining the proposition to a user off the street, it still wouldn't be fair unless you laid out the drawbacks. Which leads me to a question.
There must be countless individuals all over the world who suddenly can't log into their Gmail or create any new accounts because a fraudster sent spam from their IP. I wonder: has anyone has tried to quantify that problem?
There are absolutely no actual drawbacks for most users.
> There must be countless individuals all over the world who suddenly can't log into their Gmail or create any new accounts because a fraudster sent spam from their IP.
Places with open WiFi like hotels and restaurants would be having the same problem. People on CGNATs would be having the same problem. An IP doesn't correspond with a single user.