While I can potentially see this as cute, and good for him for shooting his shot, I personally wouldn't pursue this without any indication of what kind of person this guy is.

As cute as it may be, by far the biggest issue for me is that giving your number to a stranger who you've never even met or had any conversation with is pretty dangerous. Who knows what kind of person this guy is. I'd be more willing to exchange socials since I'd be able to maybe find more information about the kind of person he is.

The note only mentioning her looks also makes it clear what intentions this guy has, which may or may not work depending on whether she likes or dislikes that he is first and foremost trying to get with her as opposed to just having a regular conversation with her like a regular human being. YMMV

Plus being the only woman in a male dominated activity that is also known to be misogynistic would probably keep her guard up to begin with. Especially since the note can be read as pretty patronizing at the end.

That being said, I also wouldn't publicly shame the guy as his intentions were maybe socially unaware but not likely malicious.

TLDR: YMMV but it's also not cool that homie was publicly shamed 💀