Im not asking for how to's as this is obviously illegal I'm asking you to explain what the hell you are talking about, you make vague statements rather than proving any information of worth.
To say you can not discuss knife crime on this forum because stabbing people is illegal is simply incorrect and likewise we CAN legally discuss, hacking, viruses, piracy and modem technology and supposed flaws as long as no information is provided on how to break the law.

There are so many historic things regarding cable modems and surfboards in particular such as being able to uncap them and spoof your IP Address among other things, these used to work and are tricks from the past and remain there.

Do you mean firmware flashing, the application called Sigma or un-registering the modem to try and obtain free service ?
These hacks do not work on DOCSIS 1.1 and 2.0 modems which only accept firmware digitally signed by the ISP

A simple question here, do you believe that an admin of a network such as your ISP can not sniff your traffic or tell when your packet shaping ?

Like I have always said, the guys who write viral applications like Melissa and others running bot nets are clued up more than most people, often running multiple proxys with operating systems more secure than Microsoft Windows yet they can not effectively hide themselves and always get caught.

Im always happy to discuss technology? - would you like to discuss the manner is which the ISP mentioned assigns IP Addresses, how long they keep a log of who has them for and the policy on port throttling and which ports are throttled, not only do I know this information but I can support it because I used to work for them.

Presently however I am uninformed regarding specifics about what you are suggesting because at this time no information or evidence which validates a discussion has been presented, you have not even named the exploit or modification being suggested.
As such I do not know if this is a discussion regarding the architecture of the modem or the way in which the ISP assigns IP Addresses and bandwidth.