After I had started waking up I would always book using a different dicounter, such as ChoiceHotels. I would usually stay in the same hotel as the friends, but at 10 or 12 $ less per night than they were.
Interestingly, I never made it a secret that I did this and I never received any flack for it. It seemed that as long as I was using the hotel on the list, well, I was "obeying." Fact is, using a different discount was the same as using a hotel not on the list. But no one seemed to figure that out. Occasionally, in my area, they do have a rate that is competitive with what I could get, at a hotel I feel like staying at. But the way I feel now towards them, I'm willing to pay a little extra just to not further their ends.
For the OP, I the same, I despise the WT's disingeniousness. They are misusing their authority. (2 Pet 2:3) They deserve the contempt they should get.
By the way, I always make sure to point the friends to the small print disclaimer at the very end of the lodging list that says using any hotel on the list is at the users own risk. I take that disclaimer as permission to not use the list if I so choose.
This reminds me of an occasion when I was still an elder. A brother confided in me how guilty he felt that he had to use a hotel not on the list due to financial reasons. Often the discount hotels will not offer the WT a reduced rate under the auspices that they already offer a discount rate. Thus, they end up not being on the list. Being on the list is driven by the Society's needs, not ours. I told the brother that he was in charge of his finances (Acts 5:3, 4) and responsible for housing his family (1 Tim 5:8), so not to worry about it. He looked kind of perplexed at me. I think he was expecting some forgiveness for his "sin," rather than be told he did not "sin" at all.