Re: Don't load third-party scripts
"If the 'purpose' is e.g. a website to advertise a product that will earn your company £50K p.a. you can't afford code audits of JQuery, Ruby or whatever the current flavour of the month is."
If, for want of a proper audit - or reducing the amount of flavour of the month - the consequence is that you end up damaging your would-be customers the loss of reputation, damages and maybe fines is also something you can't afford.
Security may be expensive. Lack of it can cost more.