Some examples this time around to show how good (scarcasm icon here) the telcos are :-
1. Madison River, an Internet service provider located in North Carolina, blocked its customers from using rival broadband phone services. The Federal Communications Commission fined Madison $15,000 and ordered them to open their system to the competition.
Source :- too many to give. Just for reference
DonZeigler .
Actually Network operators do have the tools to block content and services.
The easiest way to block applications such as voice-over-IP service is by turning off certain Internet Protocol ports on network servers and routers that feed consumers’ computers.
For example, "cable operators using Motorola Inc.’s Broadband Service Router cable-modem termination system units can program them to accept or drop traffic coming from a specific source and aiming for specific IP ports — such as Port 80, which is often a target for hackers to deliver viruses" , said Mike Cookish, director of product management for Motorola’s Connected Home Solutions unit.
But then Port 80 is used for http:// as well as there are couple of port 80 torrent trackers also so they will get effect.
Content from specific providers or Web sites also can be blocked through a device that can inspect the contents of packets of information being shipped through a network.
Called a deep-packet inspection device, it can block traffic headed to any IP port on a network server, or it can block requests for Web site access based on a list of Web addresses the network operator supplies.
2. In 2005, Canada's telephone giant Telus blocked customers from visiting a Web site sympathetic to the Telecommunications Workers Union during a contentious labor dispute.
Source :- Again many but would use the people effected.
Voices for Change you can see the whole drama unfolding month by month there.
3. AOL blocking mails to a critic site . Could give many sites but would use the beautiful anti-AOL site
DearAOL
4. What about our own BSNL, AFAI remember they had also done something similar in case of VOIP. Lots of people had complained for the same. When private ISP's came there were directives so that people couldn't use VOIP services. Ports
used to be turned off many a time.
Edit: These are supposed to be one-off isolated examples by anti-neutrality backers but then we know better :bleh: