I think a anonymous call is in order.

The fifth pillar is owning everything anonymously.

If you are looking for anonymity, you may want to think options for taking title.  

I also suggest a drive-by so they are not unpleasantly surprised by the neighborhood when they to the showing, and just keep on driving by anonymously as I wait outside.

If not, (and they're not sub-$50k houses or something) I would consider placing them properly in an LLC for anonymity and asset protection.  

I believe there are paid services available just that purposes.Depending on what sort of liability and/anonymity protection you are seeking will dictate how you structure.

It is correct that for optimal protection you will have trust embedded in the Series LLC, the structure looks like this (for lack of having a chart available at the moment here we go: ​Series LLC (parent LLC)  Agent Trust (anonymity)Child Series A >>>123 Main Street Trust >>> Property: 123 Main StreetChild Series B>>> 456 Main Street Trust >>> Property: 456 Main StreetChild Series C >>>789 Main Street Trust >>> Property: 789 Main Street..........

That way I get some anonymity, asset protection, and limited liability.

It seems there are pros and cons to this for the link with the subject "Anonymous Landlording"http://biggerpockets.com/forums/52/topics/24753-anonymous-landlording-?

As the outside liability protection varies from state to state, a usual structure is to have all the local LLCs owned by a holding LLC (often in WY for its anonymity, cost and excellent charging order protection).