This separation of responsibilities can additionally increase the anonymity of the Holding Company.

You could own them in an LLC or in your personal name and it's all the same.An LLC is useful for two things: anonymity and legal protection.

How many developers / gc would supply their budget to an anonymous aggregator?

For public anonymity purposes I would never use my own name. 

Basically creating a strawman entity or trust to make offers on another's behalf to protect their anonymity or give them the ability to buy something they normally wouldn't be able to buy because of a tarnished relationship between the two parties?

Quote from @Dion Watts: An LLC is useful for two things: anonymity and legal protection.

.- Using a Google Voice number (or the like) to remain anonymous is the antithesis of operating ethically.- Utility poles are the property of others and not only pose an inconvenience and hazard to utility company workers, the posting of signs and the like is prohibited in at least some states.Just because others here have posted advice (and may do these things themselves), be cautious about what you do with that information.  

Its really for anonymity. 

The problem with the third party anonymous appraisal ordering that is now mandatory is that too often appraisers are from 45 miles away and have no idea of such things. 

The really cool thing about BP is that they are not 'anonymous first name only" references.