I know what kind of mobile phone you use - WECHAT is absolutely not targeting you as a user and I respect both sides of that issue.
WECHAT is a P2P social media platform that provides a wealth of additional features, including B2C and C2B. Western social media platforms, such as twitter, etc are beginning to copy the Chinese phenomenon as an extension to increasing market share and revenues without the annoying googleads crap. Expect to see a flurry of M&As as they snap up applications and services. WECHAT et al will naturally suffer from abuses, such as spam, identify theft, and solicitations for sketchy services - so caveat emptor. Abuses can be reported and similar to most social media platforms, requires an unpublished and un-advertised critical mass of complaints before some kind of punitive or blocking action is enforced.
It's a great platform for group messaging, but not particularly useful for professional group messaging (look at bitrix24, github et al for something more professional and private).
As for protecting your identify - putting yourself out on the internet demands a certain amount of discretion and common sense. The need to publish one's self online for the world to see, when you wouldn't normally reveal such information personally to a complete stranger defies logic.
Along with useful public and social benefits, comes all the associated abuses, but I've personally found WECHAT to be an interesting and diverse platform for providing a wide breadth of consumer services - from their UBER clone, POS e-payments, paying bills, ordering delivery services, etc ad infinitum.
But again, a modicum of common sense is in order.
And for the record, WECHAT and similar social media platforms in China were recently lauded in the hi-tech west as examples of copied western tech that then took off in a flurry of incredible innovation to become a global example of the commercialization of formerly free web services WITHOUT the click ads approach to revenue generation - although those activities are most certainly also present.
My neighbor uses WECHAT to run her own home-based store selling various products to her increasingly growing network of contacts.
Best approximation is an network extension of the AMWAY/Nutrilife/Mary Kay et al social networking businesses, using a social media platform - with the associated risks of doing business online for both parties.