With the knowledge and financial means to purchase an investment property, they are not an incompetent person; based on how courts normally examine the situation in which you present.The fact that the PM keeps the late fee also doesn't harm the LL, because the LL is still getting their same amount of rent as is guaranteed to them in the agreement.

Rather, out of a feeling of responsibility to my former tenants, who I happily provided positive references for.The reality is that it does a landlord no good, and could do harm, to respond to a reference request.I have also gotten calls from landlords lobbying for a statutory and regulatory change.  

The police don't remove people claiming tenancy rights unless they are an immediate physical harm to themselves or other.  

Nothing is offered to cause harm to anyone, but may be useful in your situation.

There would be no need to take this matter further legally and if so, could cause more undue harm than intended.

You ARE responsible for the harm your tenants cause neighbors.  

Asbestos is only harmful in it's friable state, option #1 therfore to not touch if it's in good shape.

If you play a marginal game and say to yourself, what harm would one more do, you could keep going and going until you have a menagerie in there.

You may be actually causing harm.

Creating a false sense that someone posting online is not subject to harm does them an extreme disservice, and will likely get them in legal trouble should the worst case scenario actually come to fruition.I will note that I agreed with some of your more specific recommendations, but I whole heartedly disagree that this person does not need an attorney, or should not venture out to retain one.