I'm really glad you found the post educative. Actually, having tribal marks is very common in Nigeria. Even the Igbos, Yorubas, Hausas etc have their own tribal marks, but you can easily differentiate them.
Yes, some places have very strict traditional practices. For example, In some parts of Igbo, there's a particular festival called mmanwu festival. A particular dreaded masquerade normally graced the festival once a year, but only men and titled women are permitted to see the masquerade.

Thanks a lot for reading, Nancy