I'm surprised at the arrogance and even offensiveness of several of the comments posted here. (I'm also reminded of the currently trending article about sexual harassment and assault at OSS conventions.) The author's issue not with men hitting on her, as she clearly explains. Her issue is with men obtaining her contact information ostensibly to do business and then using that contact information to hit on her. Really…
To the posters here: Getting a girl's number to ask her on a date on the pretense of networking is creepy.
To the author: Some guys are creepy. Deflect them like you usually do.
This doesn't seem such a big deal!