It's like Singapore, where e-cigs are simply banned in the country for being another tobacco product I guess. They seem to be more lenient towards tourists though. A few cops looked my way but did not approach me. The airport security did have a second look at my bag on my way out though. A supervisor was even called to look at the X-Ray of my bag before it was let through. On one of my connecting flights through their airport the security asked me what my eGo was.
I became active at ECF a few months later only to know it was e-cigs were illegal at Hong Kong. I guess on my next visit (probably on July), my Reo is staying home.
You're pretty generous to give away a Reo.