Senior network engineer for an mid sized ISP here: These people should be ashamed of themselves. I honestly don't care even the tiniest bit about whatever sort of excuses or justification they put up. It should not be necessary for a consumer end user (whether residential or business) of an ISP in the US or Canada to treat their ISP as hostile, and develop workarounds like VPN tunneling their traffic, such as I would…
Every other business manages to inform customers by e-mail or text message or phone call, but ISPs have these additional options by virtue of the product they provide and they just can't seem to help themselves (at least for the large shitty ones, which they all become eventually).