I think there is a miss communication between consumers and internet providers. I think if the consumers were aware of how things are run in an ISP they will be more understanding and reasonable when facing a problem like not being able to host services yourself. From my part, I try to write about my struggles in running our ISP business .
Another thing to consider why we can't easily allow our user to run services if we wanted to because most home users IPs are not static, and often your IP is shared by many users. IPv4 is running out, giving our user the ability to run service will also mean giving him a unique IP, which they will have to pay for it and because of the scarcity of unique IPv4s only business users are allowed to have them and business accounts cost money. We haven't moved to ipv6 yet, it will require some investment and overhauling some of our networks. Depending on your local law, you may actually have to have a business under your name, meaning you have to show business license papers, to get a business connectivity.
I know what you mean by having to run your own blog or services. I have done it myself and I have learned what I know today mostly due to me tinkering and optimizing apache and WordPress on the fly when it was on the homepage of Digg. It was such a rush and I have come a long way since those days, thanks to being able to host my blog on a time warner DSL line. This was in the early or mid-2000. But it was a different time, and things have changed a lot since then.
One of the reasons ISPs back then used to give you free email address and shared hosting, because they wanted to tie you down to their services. Specifically, if you used their email for a long time it would be difficult for you to leave it behind. But the landscape has changed since then, consumers are smarter and webmails are much better and free blog hosting are dime a dozen.
My advice to people who want to learn hosting services by doing it themselves on their own computer that, even though it can be a thrilling experience, hosting it remotely and configure/securing server from scratch can be an even better learning experience. And VPS hosting services like digital ocean can be very affordable.
There is a popular misconception that ISPs are a profitable business and they try to shaft the consumers at every opportunity they get. Maybe for the big players like Comcast, it is true, but the rest of us small and medium sized ISP its far from the truth. The complexity in running reliable services can be staggering, the equipment and licensing can be an astronomical investment (at least for us it's a large amount) and running the last mile and upkeep for it with 24/7 support are very expensive for us. BWs are not expensive, but equipment is. When we saturate our 10gbps port, moving to 40gbps or even 100gbps network (switches and routers) can be a mind-numbing expense. On top of it, we are taxed and need high license fees for all kinds of services. We really don't make a lot of money and you constantly have to spend on your infrastructure as you grow (fighting to get customers by lowering your cost, and hence your revenue and profit). You have to keep growing to stay relevant and reach that point you can connect more users with minimum costs without having to invest in growing your network. Reaching that point can take anywhere for 5 to 10 years, if not more.
Sorry for the rant, I just needed to get it out of my system. :)
http://www.slashgeek.net/starting-isp-really-hard-dont/