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Just to follow up on LG’s data collection from its TVs, an LG “investigation,” (in other words, “Who screwed this up so we got busted?”) showed that they were in fact collecting customer’s data even if they opted out. LG says they are going to address it and make the disable feature actually work:
"We have verified that even when this function is turned off by the viewers, it continues to transmit viewing information although the data is not retained by the server. A firmware update is being prepared for immediate rollout that will correct this problem on all affected LG Smart TVs so when this feature is disabled, no data will be transmitted." - LG
It doesn’t require much effort to put up process a request and put up a 404 response, and any data sent can still be processed by whatever service they have running. Plus if you are doing something a little shady, most people will see the 404 response and just think that it is an “empty” page that doesn't do anything.
BTW, I was interested in the story behind your post, so I did a little searching. Looks like LG is responding at a much higher level to this now, and since this happened in Britain, the Information Commissioner's Office is investigating it as a possible violation of British Data Protection Act. To be fair, LG has also issued a statement that they are issuing a firmware update that will disable this “feature.” The BBC has an article about it here, if you want to learn more about it.