This knowledge gap threatens the credibility of the industry." 

Did you see that the former Housing Authority Director just threatened to sue the city for $41M if they don't give him $1.5M?

As some other people have suggested, your biggest bargaining chip is if you threaten to leave before the house is sold.

(She found that threatening.)  

You could use the lease as a billy club and threaten or put up notices to comply and give out verbal warnings all you want but at the end of the day you got a party animal trying to mingle with a family man with just a few boards between them .

And he has a tendency to be aggressive, and he even threatened to not pay rent on his second month because he thought his demands are being ignored.I keep hoping that every time he makes a request and I comply, he'll eventually be happy and stop costing me so much.

I immediately start making tenant pay late fees and/or NSF fees, enforce the rules, refuse their demands for free rent when there is a repair issue, and of course the tenants hate me, call me names, think I’m evil, threaten to take me to court, etc etc.

I threatened her with filing Breach of Lease due to maintenance abuse, and worked the phone heavily with the Section 8 program, so together we were able to convince her to give her 60 day notice.

My last housemate turned out to be a complete BULLY - and is threatening to take me to small claims court if I withhold 1 dime of her deposit.

AIG bonuses might be bad, but that isn't threatening our democracy.