Consumer Electronics manufacturers, including Samsung, have been operating in an anti-competitive manner for a long time. Until very recently cellular phone companies took great pride in making sure accessories were not compatible across manufacturers and even not among lines of their own phones. This was done to increase profit margins and sales volumes.
My "beef", as you put it, is this is just another example of this behavior. On top of being overpriced, it's wasteful. At the end of the useful lifetime of the Samsung Blu-Ray or TV, a generic wireless dongle could be used again on a laptop, computer, or possibly on the replacement TV or Blu-Ray. The Samsung dongle will have to be thrown away by all but the tech savvy that know enough on how to work around the ID code of the dongle.
Conversely, TiVo encourages the re-use of all components that they associate with their products. The first peanut remote from the very first line of DVRs they produced will still work with their newest model and even on different platforms and from different manufacturers licensing the TiVo software. Yes, even the Samsung brand TiVo. TiVo also sells their own wired and wireless ethernet adapters at the same time they provide a full list of compatible adapters from other manufacturers AND they continue to update their software so new products can also be supported.
The tide on this type of Anti-Trust behavior has been changing. Auto manufacturers aren't allowed intentionally block competitors from making replacement parts and accessories. They also can't arbitrarily void your warranty if you do (which they tried). Microsoft got into big trouble with the FTC, US DoJ, and the EU for writing their OS so you couldn't remove their accessories and replace it with competing products.
I think that Samsung should re-think their position on this type of behavior as the US and EU governments are beginning to pay attention. Consumers, like myself, are paying attention too. I certainly take this into consideration when I am shopping and will vote with my wallet.