I have had nudges 'blew you a kiss'. Some have been from men looking for an intimate encounter. I send all of these back, sometimes. I don't think I've initiated contact more than once with a guy looking for this. Will nudges get you blacklisted?
I think my traffic is quite low. Maybe I should do a 'rate my profile' or maybe it's because I've gone into stealth mode.
It's not a big deal anyway. A couple of my relationships have begun just like that (they didn't do well for long, though)
.. and the first time I used a dating site, a guy looking for 'dating' was only after 'sexy fun' - quoted from an email. Better that they're honest.