I see it as no different to a pre internet "blind date" but even people of that particular era, see it differently for some reason? If anything it can be seen as safer as at least if you spend time to get to know the personality of the person behind the username and avi, you get a better sense of WHO they are, rather than perhaps what at one point they were pretending to be. Old style "Blind Dates"...no... possibility of that guy with a (supposed) "good personality", being a dork you have nothing in common with at all with a creepy, greasy comb-over and baked-bean teeth.
Either way, it's a matter of putting your trust elsewhere for that moment in time and also trusting your own instincts when it comes down to an actual "meet up". I met my FUB in a group of 5 setting with others from the same site in a public place. We all hit it off in RL too but he and I just had a better more intimate (as in humour, thoughts etc) connection. In hindsight, I know his mother had issues with me and the whole "interwebs" thing but her own paranoia was unfounded. I can understand your need at the time to hide it as if you were dealing with people like my "MIL" then your caution to talk about it, was warranted.