What is the threat on WordPress User

HI,

I am building a small WordPress blog, i think i have done all that is
required from security point of view however recently i notice that
there some of fake user registration.

They are not many since i have captcha enabled and auto registration
using some scripts or bot is not possible. May be 2 or 3 a day, and
most of them are from PRC :-)

I want to know does anyone here thinks this is something i need to
keep a watch on, something like a early warning sign.


-- 

Regards,

Gautam

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