If you have others to vouch for you it's helpful since one thing everyone look for is creepiness - how much of a danger could you be? If you're just shy or awkward it might mean tough luck since it's hard to differentiate, but with an introduction this is much easier to overcome.
Seriously, the first hurdle is not 'is this guy sexually attractive' but 'is this guy potentially dangerous', and it's far safer to err on the side of caution.
I've never seen anyone imply: "this person is not a danger"...
I guess you can get some signals, sometimes... For when a person IS a danger.
But anyhow, most abuse happens in the privacy of a home, so I don't think I'd be able to vouch for anyone to really not be a creep. You never know what side of their personality people might be keeping hidden.
Seriously, the first hurdle is not 'is this guy sexually attractive' but 'is this guy potentially dangerous', and it's far safer to err on the side of caution.