Being a world-renowned site, IWantAsian does everything in its reach to ensure the safety of its users. The site has 256-bit SSL encryption (best-in-class), meaning even the most advanced computers can't breach its security, i.e., the user data. It also has an interpersonal online security team and a dedicated specialized team to wade of fake users from the site. So, there is a good chance that you will not encounter any vulnerabilities from its side, i.e., man-in-the-middle attacks or fake users looking to scam you.
The personal security, however, is in your hands. IWantAsian recommends its users review the SafeDating guides and follow them while interacting or meeting with members. And that is why you will not find any negative reviews from the site's users bitching about how someone robbed them or threatened them.