Am I over paranoid? I notice my kids' childcare page have this Bangladesh guy liking photos of the kids. I clicked in to see his profile but notice he is not married & have no kids then why he is in the page? I don't know but I feel very uneasy

I think you should contact the childcare and get it removed from any public sharing platform or get the privacy settings to be private/invite only. Because if one bangladesh guy has liked it, many random people could have seen those pics and it is not good from security point of view. I for one would ignore such events but you can also verify the childcare staff and their profile for your peace of mind. And talk to your kid about meeting any stranger. I am not trying to scare you but these are strange times and one should always keep an open eye. I appreciate your level of attention.