They don't block it because of the publicity it would generate. Social factors matter. "We blocked people for using special hacker privacy tools. Stop using th

They don't block it because of the publicity it would generate. Social factors matter. "We blocked people for using special hacker privacy tools. Stop using the special tools if you want service." versus "we blocked people for using the most popular kind of end device. Buy a second, really obscure brand of device if you want service." (In the US, that is. Outside the US, Android devices are more popular but Apple still has the plurality because there's only one of it)