These are really obnoxious examples as they violate the rules of the language that exist for a reason. If you use an exclamation mark, you want to attract the a

These are really obnoxious examples as they violate the rules of the language that exist for a reason. If you use an exclamation mark, you want to attract the attention of the reader to something for a reason. Similarly, there are rules for creating initialisms and acronyms and random capitalization changes are not part of them.