To be fair to the accused, I have had similar problems. Not playing tonite because my connex is ugly. Generally, I dont even try when its this bad. I know its my cable company and they told me that they would have things fixed in...umm, 2 weeks lol.
Now, I haven't warped quite as bad as described here, but I have been acused of jiggling the cable. Stupidest thing I ever heard. Anyone who thinks its even possible must have managed to do it once or twice. Cant see how it could be done, I lose conection completely if I sneeze too hard.
Point being..... dont start a witch hunt, wierd stuff happens all the time.