Someone got hurt on the sidewalk on my property (owned by us). 

I'm sure you know what comes next.....yes, there was an oil tank buried underneath the sidewalk clear as day in front of the house.

That "restaurant" also served alcohol and had dance bands and the clientele would hang out on the sidewalk outside the place, and also be noisy drunks. 

My friend has dismissed their threats of taking legal action in the past on things like no salt on sidewalks while it is still snowing....but what if?

The children often would make it a game of purposely destroying the beautiful streetlamps and the sidewalks and the yards.

Another option would be to do a matching planting on the left side of the walkway, and just put sod in front of it to the sidewalk.  

I also saw she had painted the sidewalk, and tile, and basically made a total mess.

or from a tenant slipping on a icy sidewalk on your property?

The one Sheriff at the door literally grabbed him by his shirt and placed in on the sidewalk outside the front door and he stepped inside. 30 seconds later, saw four adults leave the house - nothing was packed - after 5 months of hell from these people.

This year has been especially bad, they asked me to replace the sidewalks, which I actually did not know the owner was responsible for.