@MandM!, Thanks for your reply. I know, my family in the US never allowed me to do sleepovers when I was in elementary while all my friends had fun and had better bonding because of it. It's just not part of the culture of norm as you mentioned. As high maintenance that kindergartners are, I would not want to have any involvement in sleepovers.
I didn't think about the schools and protests being the backbone. Good to know. Thanks for giving me your point of view. I keep thinking that maybe I'm being too strict or paranoid. Hearing all of your opinions means a lot to me and lets me validate that my concerns are real.