He is a good worker, but I am very concerned about having him work on occupied properties (so far I have only had him do exterior yard work on vacant houses)--   When I confronted him  about what we found, he said that I was happy with his work so why am I concerned about lhis past & doesn't everyone deserve a chance, etc.What would other landlords do? 

I then confronted him that he had MY house for rent.

Just saying, for example, talking about doing Lease/Options gets you nailed locally as some scammer if it's not usual and customary methods, you may give too much info out.I have not blogged really, I do battle in the forums, LOL, blogging would keep you out of confrontation from competing opinions, it's the way I'd go if I were doing business

I think confront is not the word to use. 

Confronting ones credit is confronting ones past.  

When customers complained to the manager, the manger confronted the man, his date, and his snake."

Confront tenant on the lease that their 'visitor' has been here longer than 14 days as agreed.Then hand her the application and teller that the visitor must submit this if he is going to stay.Once you have the info, then require that he too sign the lease if he expects to stay (vetting is optional, as you're after the personal data).Your 25% increase is questionable IMO as we rent units, not beds as in a hotel.

You may be able to contact animal control and have them pay a visit to the owner if you don't want to confront him/her directly. 

The inspector, who was very confrontational a moment earlier, smiled at me, apologized for inconveniencing me, quickly packed up and left.

I went myself to verify and make sure that nothing had changed in their policies.In another town, we had a furnace replace, while the company was there and we were not there the code enforcement officer unannounced and uninvited and without permission went into the house and confronted the firnace isntallation company.