Ephesians 5:6-8

Let no one deceive you with empty words, for because of these things the wrath of God comes upon the sons of disobedience. Therefore do not become partners with them; for at one time you were darkness, but now you are light in the Lord. Walk as children of light

-Ephesians 5:6-8

We must beware of one who deceives with empty words.  NLT gives context to the deception, "Don't be fooled by those who try to excuse sins" and so does AMP, "Let no one deceive you with empty arguments [that encourage you to sin]".  This makes sense, since Paul is warning his readers against these sin.  It would stand to reason that talking about deceivers in this context would mean those deceiving people away from what Paul is encouraging.

With regards to these deceivers, there is a clear warning.  Paul makes it clear that those following the deceivers are those who the wrath of God falls upon.  It is those who try to excuse these sins (in their own lives and in the lives of others) that are owing to God's wrath (which is a scary thing!).  This is actually the reason why Paul's readers are warned against following these deceivers.  It is precisely because it leads to being the objects of God's wrath that one is warned against being an encourager of sin.

Paul goes on to speak a little more to this deception.  Specifically, he warns his readers to "not become partners with them".  We are not to do what they do or be associated with their sinful behavior.  This is fairly similar to what Paul just said about not being deceived by them.  So, why are we not to partner with them in their sin?  The reason is because you are light in the Lord.  Followers of Jesus are those who used to be darkness, but now are light.  He has saved you and redeemed you from your deadness.  If this is the case, we are to "walk as children of light".  This probably goes hand in hand with imitating God and walking in love.