I wont answer for all networks but in most standard agreements it will state that your information will be given up for a subpoena or if you violated any third parties rights.
In the context of the FTC coming knocking, i would guess that any .network will eventually give your information to them either willingly or by force.
The best way to avoid that is to play by the rules. In our world the FTC will enforce whats called section 5 of their code which relates to misleading and false advertisements. You want to ensure that your ads are not false or misleading. You cant say you will lose 40lbs in a week if there is no documentation proving it. Without proof that Becky exists the (insertnamehereweightlossblog.com) technique could be considered misleading.
Also if you think the FTC is working on something that has gotten big in the past two months you are probably very wrong. The FTC investigates for a long time before they do anything, and it usually takes them years to identify something to investigate. Look at how long ringtones ran, or debt consolidation companies, enron, travel clubs, etc...
For affiliates make sure you are not misleading or being false to consumers. It is OK to use logos of news outlets if the product was featured on it, its OK to set up your own review site as its your opinion. But its not OK to make claims that are not true.
The FTC will subpoena your host for your information, not the networks. Ad networks act as a basic conduit for advertisements, similar to the newspapers, magazines, or TV commercials. The networks involvement is non-existent in this issue.
Everyones paranoia will kill the diet space before it even starts, you guys need to operate under one rule, make sure your ads are truthful, if they are you have nothing to worry about, if the product really helps you to flush pounds is not your concern, the company is the one asserting those claims you are taking their materials and distributing it, if its wrong its the advertiser who has to deal with it.
I would say there are close to 25K orders of acai a DAY, 750K a month, do you think the 86 complaints you see online are a lot in comparison? if you spent $750K and made $86 is it a lot?
And the complaints are due to growing pains more than anything, if you want to do something about the complaints stop marketing the offer for a week