(A) You run the deal, do the analysis, run it down, ignore the noise and follow the math. 

Generally, these tenants ARE harder on the property, harder on the neighbors (noise, excess cars, late nights) and have more drama than people that work for a living, or are otherwise independently wealthy.

If the noise is during quiet hours I will issue a lease violation.

I hope it's not my rental, those kind of noise complaints could hurt an investment.

You say most recent sales are in rougher areas, pull the crime stats to prove this and traffic counts and anything like noise or worse schools...

I am not aware of any solution for the text spam, except just turning off the indicator noise for texts so at least it doesn't interrupt you.

They have called the police on guests (in the middle of the day, for parking over a sidewalk in the driveway, for noise when guests were playing dominoes by the pool and on and on)…one neighbor yelled obscenities at my guests (in front of children), saying, “We don’t want tourists!” 

Up/down units can be terrible for noise.

Has anyone noticed that BiggerPockets is roughly 140,000 post away from a million?I bet that if we, as a community, gave posting an extra effort we could reach 1,000,000 posts within this year. Thats only 25,000 posts...

I like the inline fans because all you can hear in the bathroom is a very faint air whooshing noise.