Spells that protect from the elements require a check vs. the caster's prime requisite or they will fail at the worst time. It seems likely that spell keys can overcome at least some of these problesm. Power keys given to clergy are often miniature skulls. Referees might not want players to realize that they have entered the Abyss. Depending on the site of arrival, visitors might believe they are in a post-holocaust world dominated by weird, cruel cults.
Ideologies presented by the clergy are unprintable.
In our world, professing chaotic evil alignment is bad politics. Even the worst people claim moral high ground, citing present or historic injustices, needs for personal freedom and expression, and so forth. Here are how some persons who may be of chaotic evil alignment have presented themselves. Follow the links, and you'll see through the bunk. In Verdi's opera Otello , Iago has an aria in which he says everybody is really chaotic-evil.