So this is basically speed dating for job interviews ! This is how most speed dating events work (atleast in London) - you indicate your interest in the other person anonymously and if they 'like' you back, the system sends out an email to both.

This kinda breaks when someone ends up clicking 'like' for everyone they met at the event ! This someone in your case will be recruiters who'll use the information to hunt probable passive candidates.

So in search for discreteness, the job-seeker would end up falling prey to the game of head hunters.