Lies

At what point does something go from just a white lie to a huge one?
Are we just stretching the truth?
Everyone I know has lied at some point.
Are they stretching the truth or just lieing straight out of their arses?
At what point does protecting ourselves/protecting other people then become us looking out for number one, should we do whatever is better for ourselves no matter how hurt everyone else gets, or do we do the oposite and get walked all over, theres no in between.


In my head I see lies as small ones that are put into place for protection (these are the ones i find acceptable) and then theres the lies that people say on purpose because they can and to look out for number one. (i dont find these acceptable)

So how do you react to one of these compulsive liars do you lie back, act like it didnt happen or walk away?
which one of these options is the best? how do you overcome it and make sure it doesnt happen again?

One things for certain, liars are not acceptable its just learning how to deal with them, which im still unsure of.
Its all depends on the lie, the consequences and your own veiws,.