Antichrist will want to make very clear, and very horrifying, the alternative to taking his mark. I have no trouble at all believing that he would employ the use of a guillotine. They are a truly terrifying sight, especially when you are poised to be the next watermelon placed on the chopping block.
I'm a big fan of the pre-trib rapture, but I am not yet certain on this subject. I will serve God regardless, and praise Him until forever. If I'm still around when the the mark becomes law, I will thank God for allowing me to become a martyr in the name of Christ Jesus. It's an honor to serve Him in this life, but really, what a way to go!