>> I suspect the reaction is based on being forced to use it when you'd
>> rather not, like many residential ISPs require. It's particularly
>> upsetting when the CPE doesn't even have a globally routable address.
>
> How much is many?

Um, some? I don't have any sort of global count. I've had 7 broadband
ISPs.
4 of the first 5 (I've stopped asking) wouldn't provide multiple IP
addresses
without moving to a "business-class" service, which is usually bundled
with
one or more things I didn't want (or want to pay for), like symmetric
links,
QoS terms, &c. 2 of the 7 (in the first three; maybe this practice has
finally
been discredited?) didn't provide the CPE with globally-routable IPs.
The
sample size is small, but is distributed across two countries and
three US
states. I've also gotten ample confirmation from others about the
first part.

And, of course, this doesn't address things like hotels and wifi
hotspots,
where the mandated use of nat is so common as to just be assumed.