No you don't need to do that. Just stop asking for a user's password. This way you're doing the exact opposite of what you should be doing: this is filtering the smart people out. Only naive users enter their password on a website that has just been created, exists for like five minutes, has a handful of jobs on it, and happened to make it to the HN homepage claiming to be a job site. I'd almost create a similar site, then post all password in a heavily hashed form so that users can check and confirm it's valid while not actually revealing their password.