Do You Know These Weird Facts About Montana? If you do a little digging, you'll soon realize that Montana has some really weird laws. Here's an example. Did you know it's a felony for a wife to open her husband's mail? That's just the tip of the iceberg. It's also illegal for married women to go fishing alone on Sundays, and it's illegal for unmarried women to fish alone at all. Seriously, what's up with some of these laws? In Billings, it’s illegal to bring a bomb or rocket to city council proceedings. In Excelsior Springs, it's illegal to throw a ball within city limits... No wonder the football team hasn't won a game in 65 years (I just made that up). Oh yeah, and if you plan on visiting Excelsior Springs, you better not "worry" the squirrels, because that's illegal too.