IMO there is almost never justification for lying. The only kinds of lies that are ok are the so-called “little white lies,” like telling your grandma that you love her new hat – but even those should be used sparingly, and only when there is no other way out of the situation.
When did lying become more acceptable than saying, “Hmm, that’s kind of personal and I’d rather not talk about it”?
So are hate speech and being really, really mean … doesn’t make it ok. 
What I can’t stand about people who (habitually) lie is not just their lack of integrity, which I do not take kindly to anyway. But what really gets to me in cases like in that of the OP: it is just so obvious that they are lying and that is just soooo insulting.
Habitual liars don’t just habitually lie,they habitually underestimate the ones they are lying to because they expect that you are too stupid to see through their lies. And when you call them on it, they get all insulted and manipulative (and tearful if they’re female). It’s not just their sense of entitlement that allows them to lie (while no one is allowed to lie to them, of course), it’s also their sense of entitlement that they expect others have a duty to believe them. If you don’t,you’re the baddie for making them feel bad. (“are you always that untrusting of people,snif”.) I suppose that in their worldview, the rest of us should stick with our designated role of being their uncritical admirers?
Oh and quicksilver? What on earth do you do when you told a lie on a date, and then it gets serious later? It doesn’t make sense. I’d very likely break up with you if/when I found out, while I wouldn’t think anything of someone saying that my question was a bit personal. Lying about your past life on the first few dates is a pretty basic no no for most stable people, I’d think. It signals: this is a guy/gal who’ll take the easy way out, can’t be trusted, is all about short term image without thinking about long term consequences, has issues, etc. Those who lie and end up with somebody who forgives being lied to deserve eachother, but realise that your way of dating seems to have the long term effect of limiting yourself to the unstable segment of the dating population.
CLANG, CLANG!!!
Dang, dude. You hurt my ears!
I warned you it would be loud.
Get this: at the end of the meeting I was authorized to draft a memo recomending the sacking (there’s a long history of events here, not just the lying, though that’s my own personal dealbreaker.)
So I’m HAPPILY spending my weekend drafting a meticulously detailed memo. That’s got to be a first.