Usually these team pages say stuff like "XYZ team member has worked in the field for 100 years, and is recognized across the universe as the #1 expert." They should prove those qualifications to the certifier.
Most people leave traces that you can find. If there are one or two who can't be linked to anything, then that's probably fine. Also, it's fine if the people are pseudonymous but have a good pseudonymous history (eg. they've written a lot of code, etc.). But if the whole team is full of ghosts with no verifiable achievements, then that's awfully suspicious.
That'd probably be too restrictive.
Sounds like a really great business idea for someone who has the necessary skills and time and is also able to assemble a team. Sure, at first the fee would likely be lower, but as the person or team builds a certification reputation, he/they can increase fees - I would imagine fees of $3k to $10k would not be unreasonable in the earlier stages of this process. Would probably take hundreds of hours of work and looking into, and of course the more experienced and the better auditing systems and skills are developed, the quicker and more reliable the accreditation would become.
If this is going to happen, and it sounds like for the betterment of the community.. although it is known how important Bitcointalk is for ICO's you have to make sure there is measurable reward for advertising on this site. ICO's will just allocate marketing budgets to other avenues if you don't put a case together.