Can anyone comment, just for my own morbid curiosity, if they think cutting off cable access would be considered a self help eviction?

Out of curiosity why are you talking to a title company about doing a refi?

Will the mortgages accrue interest if not paid for the 3 months?

I would just advise that forbearance is not forgiveness and still accrues interest; you probably know this if you have student loans. 

They will cause the landlords temporary pain, accrue late fees and back rent, and eventually when America reopens, get evicted, sued, and have their credit ruined.In that third case, a minority of landlords are being forced to basically donate free housing to the very worst behaving tenants.

During the potential 360-day forbearance period, no fees, penalties, or interest beyond the amounts scheduled or calculated as if the borrower made timely contractual payments shall accrue on the borrower’s account.Reciprocally, servicers may not collect any such fees, penalties, or interest during this forbearance period.

When you use private or hard money to do a BRRRR deal, all these costs accrue (interest, insurance, taxes) when you are doing the rehab and unable to obtain cash flow.

During the potential 360-day forbearance period, no fees, penalties, or interest beyond the amounts scheduled or calculated as if the borrower made timely contractual payments shall accrue on the borrower’s account.Reciprocally, servicers may not collect any such fees, penalties, or interest during this forbearance period.

Like with any loan, the 1st month just accrues interest for the buyer. 

See IRC 164"addition, there shall be allowed as a deduction State and local, and foreign, taxes not described in the preceding sentence which are paid or accrued within the taxable year in carrying on a trade or business or an activity described in section 212 (relating to expenses for production of income)."