Nine more weeks of this problem (which may be short-term for you but is probably way too long for your downstairs tenant to put up with) could mean losing the good tenants at their renewals or creating more bad behaviors from all your tenants if they realize you're going to allow their behavior until the lease ends.

It's unethical to collect someone's information through your website and then sell it to another investor. it is unethical to have 600 gmail accounts to contact investors and Agents on CL about their property only to collect their email address when they respond.It is not "very unethical" to be out of inventory, but still put up the floor product on a display for the people that are window shopping.

Recently BiggerPockets released a web series called "Meet the Member" where investors in the community get to tell their story and show display their investments.

Such proof may be displayed on a smartphone or presented as a physical copy. 

So I think you'll see prices change once behavior changes, but considering the volume of people it could effect: home buyers that have plans to move, and then the subset of that, homebuyers that have plans to move who's tax event is now changed because of the new law: would be minimal.

If you see predatory behavior, call it out.

Well, I don't have a PHD in philosophy, human behavior or economics, so I just don't feel qualified to answer that one!

I got so enraged over their behavior (long story) that I ended up putting up a web page devoted to all the crap we had to deal with from them.

Money is 80% behavior and 20% head knowledge.

The proper forms will need to be used and your license displayed properly.