If a punter is unhappy about anything and goes legal, the first thing a solicitor will do is fling sh*t in all directions in the hope that it will stick somewhere. Whether guilty of negligence or not, you still have to defend yourself, involving time and expense.
The point is Woods, it doesn't stop you getting dragged into the argument and merely pointing to disclaimers on drawings, or saying that you voz only followink orderz is not really a successful routine for exculpation.
Everyone else involved in the process carries insurance, why shouldn't a designer?