So what's stopping these people that claim to be so righteous by using canaries from lying to you? Anyhow the ISPs and internet backbones are all tapped as many whistle-blowers have already revealed.
Nothing stops anyone from lying to you. In this case it would be considered fraud if the lie was discovered or leaked. Which is one of the rationales on why courts cannot compel a company to lie and post false warrant canaries, because it would incriminate them.
Fraud? Fraud against who? For what damages?