I did not take the time to vet the text, my bad. But let's look at some of it.
As to Myth 1 from your link, it WAS voluntary, at least at first.
Myth 2 appears to in fact be completely wrong. (The original wording though!)
Myth 3 - yeah, bunk.
Myth 4 - Kinda sorta. While the SS fund is a stand-alone fund, the government DOES "borrow" money from it, with the promise of paying it back with interest. However, the SS fund for years has suffered from a declining balance, hence Dashinka's fear that he will never see his just returns (somewhere around 3034 or so, the SS fund is expected to be near zero).
Myth 5 - Pretty much NOT a myth. SS wasn't taxed until 1983. At that time, the fund was in danger of running out of money, so a law was passed to start taxing payouts as well as adding member of Congress to the SS plan in an effort to put more working people in the position of paying into FICA.
Will SSB remain for those of us in the earlier years of our lives? Not at the current rate it's being paid out at. Something must be changed to keep the plan in place. Depopulation of the elderly certainly helps the fund as much as it helps the earth.