We have a drug infested apartment complex on our Urban Street that attracts fighting, litter, and unwanted activities. 

At least not without a LOT of undo scrutiny and unwanted pressure.

Hi my name is Alejandro Flores, I'm a Real Estate Expert specialize on helping people getting Rid of their UNWANTED Properties.I know the struggle of handling tenants.

And it helps prevent those unwanted 2am lock out calls.

Post parking lot for tow for unauthorized cars.Tow unwanted cars. 

Here are some of the ones I use frequently which have a great user interface without unwanted ads, etc. and are all free:Mortgage Calculator Plus - allows you to quickly look up mortgage costs (principal and interest) and from there, has a very handy feature on add in extra payments, taxes, insurance, etc. ..

In regards to the legality, I am not a lawyer, but I cannot see how it would be illegal (as it is public information you are asking about), and you are not trespassing, if anything it would be an unwanted solicitation, but again, i'm not a lawyer.  

(I could see it being appreciated OR feeling awkward/unwanted by a tenant/neighbor.)7.

Start with a polite convo with this unwanted tenant explaining to him that the people that leased to him did so illegally and he doesn't have a valid lease and that he has to be out by the end of the month.  

You save yourself a lot of unwanted calls and waste on prospect time as well.