We had fiber at our previous house for about six years, and it was great. The prices were lower, the speeds were greater, there were no limits... It's kind of funny, because it was a college town of about 200K people in the middle of nothing else.

Now I'm up in the suburbs of Chicago where a single town can have a 200K population, but fiber is nowhere on the horizon. Instead we get terrible service that's constantly showing packet loss with slow transfer rates. We do still have unlimited, but with these transfer rates it doesn't really matter. :)

As far as monitoring traffic goes, I guess it depends on how you're doing things. If your DNS requests are still hitting your ISP or aren't encrypted, then yeah, they might know. I don't know if they'll care, but of course not all illegal content is treated the same.

So basically a non-answer to your question, along with me saying I liked having fiber.