Are women well educated about periods?

Me
Lately I've been encountering a lot of people that believed untrue things about periods, for one reason. I can almost understand this with guys, but I've heard these things from women. For example- one of my friends thought you could get TSS from wearing a tampon and a pad at the same time. Another example- one of my friends thought you could only leave a tampon in for 3 hours (!!!) before you could get TSS. Have you all heard anything that was outrageously incorrect?