Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Part of Ink Jet Scam

I'm so sorry to see Canon go down this road.The printer exists to sell inkjet cartridges. You can't use your own or refill them (they have a security sensor so that you have buy new ones).Worst of all, if either of the inkjet cartridges is low (they'll run out whether you use them or not, just because they are opened) THE REST OF THE UNIT SHUTS DOWN.That's right - you are not allowed to use the scanner if the inkjet cartridges are low! (No, scanners don't need ink.)There's lots online about the way certain printer companies have designed their units to force purchasing of expensive ink cartridges. I didn't think Canon was among them, but apparently they are.