The appearance of Lord Chaitanya. The Lord is always sinless even when apparently engaging in sinful activities. He does not come with karma to this world. He appears with His entourage (parshadas). According to the intensity of our love for the Lord we become more free with the Lord to relish more intimate rasas.
Authorized scriptures give advice that will save us from being cheated. Many small-minded philosophies propound conceptions of going to hell forever, only humans have souls, have a low estimation of life, etc. By chanting Hare Krsna we can do good to all.
If one wishes to go against Krsna, He may give them a big brain so they can find faults, but in the end they will be defeated by death.