"Creepy" means "he made me feel threatened and unsafe". It's valuable information for women to share within their social group so that they can avoid uncomfortable situations.
Though it is not at all appropriate to share such information on a public online forum.
In theory, yes. I've seen more than one woman "confess" that creepiness was more a factor of attraction - that the same behavior from two men was considered creepy, unless the woman was attracted to one, in which case it was considered acceptable, even positively (and though I'm wary of ascribing fiction as another anecdote - witness female-oriented fiction, such as Interview With A Vampire, Twilight, Fifty Shades of Grey as being heavily tinged with behavior that, if there wasn't attraction, even if unexplored / unannounced as yet, would be unacceptable).
The problem with such terms as "creepy" is that they could apply to anyone, depending on circumstances.
- Did the hot date you were kind of into try to touch your boob without asking you? Creepy! (acceptable)
- Did the ugly guy two tables over compliment you on your looks when you were both trying to get a drink at the bar? Creepy! (not so acceptable.)
- Did the guy you were dating for a few months ask you for a 5' in-person conversation after you decided to break up out of the blue over SMS? Creepy! (that one happened to me and I felt personally threatened by this woman's implicit threat of slander)
It's also interesting how prevalent the notion of "creepyness" is in the US. Whereas in other cultures the same guy would be considered annoying, inconvenient, misguided or justifiedly threatening, here a blanket term is applied and everyone accepts it. The same principle applies to a lot of emotional stuff, where Americans apply very coarse "pattern matching" to behaviors that other cultures are way more nuanced about.
Though it is not at all appropriate to share such information on a public online forum.