Weird people around

what is wrong with people who keep trying to add strangers as friends on Facebook.. I'm flattered, okay? I really am but i don't want to be on someone's list of girls kinda thing.. And it is polite to say "hello, i don't know you but will like to" msg if we are total strangers who have obviously never met before.. Not just blindly add and expected me to just accept.. Yes.. it's a goddamn bad Sunday cos Monday is here soon..