I'm not a fan of when people are deceptive, but there is a difference (to me at least) between being deceptive and out and out lying.
A person might be deceptive when they say something that might be true but that they don't actually know. A person might be deceptive when they phrase things in such a way so as to encourage the hearer to make the wrong assumptions.
But when someone knows that their statement isn't true, when they know that some of the people they are telling the lie to know that it isn't true, when they don't even have the decency to attempt to go for deception, that's a lie and it gets my ire like little else.