Have you ever told a lie? Then you are a liar. How many murders do you have to commit to be a murderer? Just one. If you have told even one lie, that makes you a liar. The Bible warns that all liars will have their part in the Lake of Fire (Revelation 21:8). You may not think deceitfulness is a serious sin, but God does.
We have to think of society's portrayal of salesmen as not true to life but as that great American character making it against the odds, the hustler. It's not that we tend to think of salespeople as evil hucksters, but that the writers and directors see them as characters relying only on their wit, character and drive.
~ Alexander Smith (December 03, 1830 - January 01, 1867)