I was astounded that got published TBH.
The AA seemed to claim that modifying cars to that extent 'bypass their safety devices' (assumedly meaning brake, tyre and suspension limits, SRS design envelopes etc.).
They really didnt seem to consider how that by choosing to drive anything you are actively accepting some risk that you may be killed or severely injured as a result of driving. The presence of 'safety devices' is irrelevant. Whilst they may mitigate the effects of or prevent the failure mode* occuring , theres no saying that they will do absolutely and without failure.
...it sounds as though the AA are standing on a high horse over current safety standards, but not acknowledging that people have been messing with cars outside of the boundaries of their original design since the automotive industry began!
* failure mode being the visible symptom of the failure. 'Safety devices' can either mitigate the effects of a failure mode, or prevent the occurrance of the failure mode entirely (e.g.: ESP can prevent loss of grip in certain scenarios, ABS limits the effects of loss of grip under braking, airbags and other SRS limits the effects of rapid deceleration)