Also, these people don't realize that law firms don't use real proofreaders any more. They rely on spell check and grammar check, neither one of which would have gagged on "fictious." They are showing their lack of knowledge.

There are words in most spell check dictionaries that shouldn't be there, especially for legal and business use. An example I saw is the word "manager." Leave out a letter and you have "manger." It's a correctly spelled word, but would almost never be used in legal or business documents. WordPerfect allows you to edit the dictionary, so at the business I worked at, I deleted "manger" from the spell check dictionary. I also deleted "ot," a very common typo, but also a real word.