Their wife won't complain, their kid won't get sick.

If the tenant does not like it, they should have rented elsewhere; not complain about it after they agreed to it. 

Now, on top of the tourists, Mexico is literally invaded by hordes of remote workers, to the point that Mexicans are starting to complain about the ensuing rise in property prices!

Then they complain that our process takes too long!

I know several investors that have done this and all they do is complain during tax season.

The investors would be advised to pool together some capital to retain the services of an experienced securities law firm to do an analysis of whether they have cause for complain, cause for lawsuit, and reasonable chance of collection.  

So you are doing construction in your yard, but not directly connected to the existing structure the tenant lives in and they are already complaining?

If a tenant chooses not to rent a place because the dishwasher is on the left instead of the right then you just dodged a headache of a tenant who would complain about everything. 

Noise travels easily in this house, and the first floor tenants have been complaining every day.

More Mods won't necessarily change things that are complained about, because as my esteemed colleague @Nathan Gesner mentioned, it depends on time of day, forum(s) frequented, posting times, and other issues that sometimes means there's a whole bunch of us here at the same time and sometimes I'm the only guy here, or Nathan might be, or Ned, or someone else.