Now that their dirty practice is out in the open. What do they do?
Oh, It's actually a bug in our software, and we'll fix it.
This is just way too dishonest.
In 2008, when users signed up for loopt, they sms/spam everyone from the address book of users. When people complained about the spam, what do they do?
Oh, there's a bug in our user interface.
http://en.wikipedia.org/wiki/Loopt#SMS_invitation_issues
If companies like Loopt succeed, it might give people the wrong idea that in order to succeed, you need to adopt sketchy practices like what airbnb and loopt have used. It doesn't matter if it's unethical or even illegal as long as you benefit from it and get away with it.
This is just sad.
Now it might give people the wrong signal that in order to be accepted by pg/YC, you need to be as sketchy/evil as Loopt or Airbnb founders