Wherever you see this happening there is disruption for the REI markets IMO. 

Of course we all have terms in the lease that prohibit general disruptive behavior. 

Regarding #1, a neighbor would need to show your tenants disrupted their quiet enjoyment of their own property and that material damages resulted.  

I do hate evictions because they disrupt everyone involved, but in some cases, the problems will continue to intensify.

You can do the ADU with the tenant there but if it gets too disruptive they could leave.

secondly how to politely say noto socializing with out disrupting the business relationship?

Aside from giving you migraines it ties you up legally and brings major disruption to what you are trying to do. 

So if you notice there is a difference here between a rapidly innovating and disrupting tech ecosystem model we have here in Silicon Valley versus what we have in the great city of Detroit where we had 3 automobile giants who refused to innovate.So I will buy into the bubble and the recession but I don’t think that the DNA of the valley matches the DNA of Detroit as a fair comparison.

Anything that is disruptive and is good for people, the government needs a cut of!

We have three tenants that we feel are at very high risk for non-payment or falling behind due to disruptions from the coronovirus pandemic.