They are causing a disruption, and may be drug dealing out of the house/shed.

But more likely, this is to protect the disruption all the tire kicking causes tenants.  

Telecommuting, small eBay biz etc typically doesn't disrupt anyone.

Crowdfunding is great, and will certainly disrupt the industry. 

It looks to me like every one of my properties would cash flow less if I lose my biggest deductions.Appreciate opinions on what we should be doing to deal with this possible disruption to our business.

The biggest miscalculation for me when just starting out was underestimating the need for adequate replacement reserves to minimize disruptions in cash flow. 

I would say the other main things to be aware of is that the laws are very skewed in the tenants favor and removing a non paying or disruptive tenant can be a hassle.

I'm not a fan and doubt it will disrupt the industry.

Disclosure: I am Director of PR for DoHardMoney@Jessica Martin - you can reach out to me for any clarifications, and I can point you in the direction of testimonials and satisfied, successful buyers in addition to any that post hereAt DoHardMoney we do things a little different than most Hard Money Lenders and as a result we’ve disrupted things in a way that competitors feel the need to raise doubts and concerns about our systematic approach and our business model.

We additionally call the previous landlords and current jobs to make sure that the prospect pays rent on time, is not disruptive and will follow your rules.Tenant placement fees, which is what your realtor is seems to be asking for would not be appropriate in your case as they would not be the ones finding a tenant for you.