Month-to-month tenants allegedly paying $1,000/month. 

After facts (not feelings) have been investigated, I was cleared of all false allegations.

If this is an issue you can add more requirements in qualifying applicants that favour applicant willing to stay for longer term, may with this in place you wont feel guilty, no applicant will feel cheated and there wont be any form of discrimination allegation against you. 

Even if the (alleged)drug dealing was reported, OP would be lucky if the police department even kept a record of a report of a suspicion of drug dealing that he heard from someone else about someone else.

But if you start seeing foreclosures increase dramatically, home affordability increasing dramatically, prices dropping, tons of days on market, investors getting out or foreclosed out of the industry, high cash ROI’s, people talking about the end of the world and RE as we know it, it might be time to start buying on a regular basis through the “alleged” bottom..?

It was allegedly a fight that turned violent and involved alcohol.

Some attorneys may be willing to take this matter on some form of contingency basd on the alleged fraud.

I am contacting you to formally request validation of the alleged debt concerning this account and to inform you that I hereby dispute the validity of this debt.

DefinitionsAs used in this subchapter --(1) The term "Bureau" means the Bureau of Consumer Financial Protection.(2) The term "communication" means the conveying of information regarding a debt directly or indirectly to any person through any medium.(3) The term "consumer" means any natural person obligated or allegedly obligated to pay any debt.(4) The term "creditor" means any person who offers or extends credit creating a debt or to whom a debt is owed, but such term does not include any person to the extent that he receives an assignment or transfer of a debt in default solely for the purpose of facilitating collection of such debt for another.(5) The term "debt" means any obligation or alleged obligation of a consumer to pay money arising out of a transaction in which the money, property, insurance or services which are the subject of the transaction are primarily for personal, family, or household purposes, whether or not such obligation has been reduced to judgment.(6) The term "debt collector" means any person who uses any instrumentality of interstate commerce or the mails in any business the principal purpose of which is the collection of any debts, or who regularly collects or attempts to collect, directly or indirectly, debts owed or due or asserted to be owed or due another.

I would secure them somewhere safe and inventory what there is.I would be concerned he was baiting me so he could come back and make some weird false allegation.