Caye Connect you obviously know more than most on this subject. For clarity are you saying we shouldn't talk about what does work on these public forums or that it doesn't really matter. Several times we have had a working, viable solution only to see it talked about on here and within weeks find it is a degraded or dead service. Paranoid scitso perhaps but a lot of coincidences add up at times too!
I don't believe BTL is *that* sinister. I think they saw their international call revenue declining and chose to outsource a jamming service (to Bitek) to offset that loss. They've effectively blocked native Vonage (SIP) and Skype. I don't think they have a room full of spies looking at message boards, devising ways to block Peter and Phil's Skype conversations.
I think your problems may be isolated... your Coral Cable connection, your PC, your viruses, spyware, tool bars etc... You can see from the responses here that several people are still using using all of the aforementioned solutions with success. Just a matter of troubleshooting your specific issue - if it turns out it is BTL, then I'd be happy to eat my words.