I agree that there are a lot of folks who fit that definition. I've sure had my share of mistakes. However, I wonder how many are really saved. Over time you will see fruits of the Spirit in a believer. Over time you will see a believer have a desire to read Scripture and their walk with the Lord will become more intimate.
We started out looking at those who think their salvation is contingent on their works. However, we can look at those that responded to an altar call or prayed the sinners prayer and then over time no change is evident in their walk and question whether they really have been justified or not. I think works may reflect the inner change, but we can't forget the thief on the Cross. He was saved (justified) and all he did was believe.
And again
Rom 3:22-26
(22) Even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe: for there is no difference:
(23) For all have sinned, and come short of the glory of God;
(24) Being justified freely by his grace through the redemption that is in Christ Jesus:
(25) Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God;
(26) To declare, I say, at this time his righteousness: that he might be just, and the justifier of him which believeth in Jesus.