He has allegedly been harassing her and threatening to move back in because he is on the lease.

In addition, six cities in the United States have enacted similar laws – Urbana, IL; Madison, WI; Santa Cruz and San Francisco, CA; Washington, D.C; and Binghamton, NY.While there is no federal statute that specifically identifies obese individuals as a protected class, employees and job applicants across the country have initiated lawsuits alleging disability discrimination on the basis of their weight.

I would think if employers are allowed to screen based on allegations (regardless of conviction or plea), that a landlord could also use this public record information as a screening tool. 

hence why its vital to have a record/receipt of any rental property having been treated (ie, sprayed or 'heat' treated) in between each tenant.absent proof of  a preventative treatment before tenant moved in, its up in the air if they are blaming landlord for an allegedly pre-existing condition.i'd give them the option to vacate if they can't take care of the pest problem as its a single family detached.

(i.e. walking in a saying you have a bad check is not the same as having a bad check, you are making an allegation.) 

The landlord has a reasonable time after notification to repair the defect or damage alleged by the tenant (repairs must be made with “diligence and without culpable delay” (Section 9-14.2(a)(5)); more than 30 days is presumed unreasonable) and upon completion of the repairs, must notify the tenant or the Department of Housing and Community Development in writing (Section 9-14.2(c)). - See more at: http://www.peoples-law.org/special-laws-rules-balt...Also...... " Landlord may not evict tenant, increase the rent, or decrease any services to which tenant is entitled for any of the following reasons (Section 9-10(a)):Solely because tenant complained in good faith to the landlord or to a public agency concerning the tenant's rights or concerning a housing deficiency;Solely because tenant is a member of a tenants' organization;Solely because tenant filed suit against the landlord; orSolely because tenant consulted a lawyer on a matter involving the tenant's rights.

I will continue raising this bedeviling mold allegation in particular lest I somehow be portrayed as indifferent to her concerns.I had a wonderful, nearly trouble-free run for a decade with a decent little portfolio of properties ranging from budget to luxury and a few in between. 

But, generally, there are specific requirements of pleading if you are alleging fraud and/or bad faith.

A landlord shall be liable to a tenant in a civil action for treble damages plus the tenant’s attorney fees and costs, and any other appropriate legal or equitable relief, if: (1) the landlord serves the tenant with notice alleging the landlord seeks to personally occupy the rental premises under subsection g. of 46A:15-1, after which the tenant vacates the rental premises and the landlord arbitrarily fails to personally occupy the rental premises or to effectuate a contract of sale for the rental premises within six months, but instead permits personal occupancy of the premises by another tenant or registration or conversion of the premises by the Department pursuant to The Planned Real Estate Development Full Disclosure Act, N.J.S. 45:22A-21 et seq.; or (2) the landlord who is a purchaser of the rental premises pursuant to a contract that requires the tenant to vacate in accordance with subsection g. of 46A:15-1, after which time the tenant vacates the rental premises, thereafter arbitrarily fails to personally occupy the rental premises within six months, but instead permits personal occupancy of the premises by another tenant or registration of conversion of the premises by the Department pursuant to The Planned Real Estate Development Full Disclosure Act, N.J.S. et seq.; or 

Once or twice during the year I came thousands additional out of pocket to fix some alleged issues with the properties.