II Thessalonians 2:3 Let no man decieve you by any means: for that shall not come, except there come a falling away first,and that man of sin be revealed, the son of perdition. In the US, the falling away has happened big time. Small country churches that was full of Christians fifty years ago are shutting their doors due to the lack of members. Sinners no longer come to church to hear the word of God preached. Revivals are not held anymore. When I was a child, our summer nights were spent going to different churches to revivals and brush harber revivals. The Holy Spirit is restrained in churches. When I was a child, I remember hearing my mother shouting when she was giving a blessing from God. I was raised in, and still am a Free will Baptist. You would hear a lot of "amen, tell it brother, and praise God, etc." during the preaching services. Now, once in a while you hear a man or woman say "amen."
Large churches are bringing in the world to attract young people. I know of a church that had a pool party and a bikini contest, with the pasture as the judge. Ministers wear sweats and jeans to church. Congregation dress as they wish from wearing jeans to revealing tops and shorts. When I was a child, my dad told me that the church house was the house of God and I would dress in my best to go to the house of God. I know many women feel it is acceptable to wear slacks, but I don't.
Mega churches are preaching 'love" only and not about the cost of sin or that hell exist. 'Falling away" mean leaving the faith. You can be a member of a church, donate money, do charitable things for the community, but if you are not doing this to glorify God, but to inhance your standing in the community... they you are part of the 'falling away."