you should do some research on the matter. they refused to replace the damaged tether because it was actually by far strong enough.
the media blowed this out of proportions. it was brought to their attention, then they went to take a look, discovered this, concluded it is unsafe and demanded they replace it, then got to hear no from toro rosso. the media fails to report then why toro rosso did not replace it right there right then and the fia accepted the reason and understood and concluded it was not as unsafe as they initially concluded upon first view.
here you go, do a good read here, it's short and clear as day.
http://www.gpupdate.net/en/f1-news/3558 ... -incident/
The FIA has cleared Toro Rosso of any wrongdoing after the team was alleged to have attempted to enter a car in an unsafe condition at this weekend's British Grand Prix.
Stewards convened on Friday morning and decreed that Toro Rosso had not attempted to mislead the Technical Delegate, and that it had replaced the relevant part, enabling the car to pass scrutineering.
and now the RELEVANT PART
An additional issue that the stewards considered was the presence of knots within the tether.
The stewards were informed by the team and the relevant manufacturer that these were standard in tethers and have been duly tested for use and homologated with these knots present.
storm in a glass of water.
this is what happens when uninformed people - ignorant people - scream bloody murder over nothing.