[Repeal The 17th]

Yes, they should be allowed to ask.
And I should be allowed to respond with, “What is this thing that you call facebook?”

[kabumpo]

Exactly. Great answer.

[Gena Bukin]

And I should be allowed to respond with, “What is this thing that you call facebook?”

Of course, if you do have a Facebook account and your employer later discovers it, you'd be in a position to get fired for lying on your application.

The best idea is that if you are job hunting, simply delete your FB account. You can always reopen it later.

[Oztrich Boy]

And I should be allowed to respond with, “What is this thing that you call facebook?”

I don't even know what a "Login" is.