Sheesh. I really feel sorry for these guys. The worked very hard on this for months. And this time, all they got from it was hate and bullying by the entire community.
Yes, they screwed up by not doing a background check on the company before including its app store. But hey, there is absolutely no proof of any private data getting leaked anywhere (if there is, I would like a source). Taig only sent data when the Chinese language was detected on the computer from which evasi0n was used. And this data only included the UUID and a bunch of prefs/settings (which is exactly what Cydia does). This did not upload your photos/contacts/emails/messages etc. anywhere.
If you are uncomfortable with this, please stay off the internet. Because your Googles and Facebooks collect and possibly leak (NSA, spying, blah) much more data about you.
Stop all this hate.
There is nothing wrong with the evasi0n iOS 7 jailbreak. Saurik himself recommends it. The job of the jailbreak is to give root access to the OS. And it did that pretty well. For free. All your favourite tweaks will work when Saurik updates Mobile Substrate (remember its Christmas and be patient).
And if you don't intend to jailbreak, please stop spreading rumours. It hurts the entire community.