The three angels message is the most fearful message found in Scripture. We are not at liberty to water it down any more than we ought to water down the Laodicean message. We are to give it just as it reads.
If we want to fail in our effort, we can altar the order in which we give the three angels message. Some insist on presenting the third message before the first. That is contrary to the light we have been given. We are to give the gospel message first, then the mark of the beast.
The devil always has two sides of error so that he can capture as many as possible.
As for scary things being preached, how about fire and brimstone as the Baptists preach? That surely get the attention of some sinners. Burning forever would scare many who know they are not going to heaven. So, we ought to present the truth to set aside the lie of eternal torment, but not leave out the burning of the sinner until sins have been paid for. That is not pleasant, but ought to be presented if we love the sinner. This has nothing to do with the mark of the beast, it is the first angels message and has its place in converting a sinner into a saint. The following explains why we present the truth of justice.
"And of some have compassion, making a difference: And others save with fear, pulling them out of the fire; hating even the garment spotted by the flesh." Jude 1:22,23.