To me a true christian is a born again christian, filled with the Holy Spirit. That person would act in the above scenario. There are many people that consider themselves christians because they attend a 'christian' church. So much false doctrine it appears that evil has infiltrated the churches. Examples: any religion that denies the deity of Christ. Any religion that is dependent on works for salvation. Any religion that worships or teaches that there is more than one God.
That being said a true believer saved by Grace is likely to act in a righteous way not for self promotion or salvation, but because they love the Lord and desire to show that love to Him. That is how I see it anyway. There are good people though in many of those churches.