Lol at this question, seriously? No, women hate it when men validate them and give them value... I mean, I hate it when my boss tells me I'm good at my job, just makes me feel so cheap, not totally valued and appreciated as an employee at all...
OK, serious voice now.
Yes it is OK to compliment girls.
It just has to be from a place of value and not a place of neediness. If a girl smiles and just says thanks it's likely she's not interested (ie she's taken) or you didn't do it right.
Tells girls they are sexy for fuck's sake! Tell them as soon as possible, or show them as soon as possible by escalating and showing interest. A man goes for what he wants.
Example: lately girls keep asking me if Im gay, because I hold myself like a real fucking man looking to get laid (as opposed to a creeper/chode) and straight males in our society never bloody do this because they don't bloody well know how, my response "how can I be gay if I want to fuck you/find you so attractive (calibrate to the girl, this takes experience)?"
How long has this community been around for? How is this still a question that needs to be asked?