Nope... Only my girlfriend knows I draw and even she isn't allowed to see my drawings. I buy art stuff in secret and hide all my drawings. I don't wan't anyone to know :/ The thing is my family is full of artists and my sister is a designer and draws like a freaking god.... I don't want to dissapoint anyone with my drawings. That's all...
I'm 27 so it's really not my parents business what I do. But my mum knows and I like to show some works to her since it's easier online when everything is organized together. I also live 230km away from her so she can look at my art even when we're apart. I bookmarked my profile for her
My dad and especially his artistic fiance would probably like to see my art as well but they don't even have a computer.
I don't see the bad thing in posting art online. However there's also this forum which has...all kinds of stuff in it so I can sort of understand why some parents might feel iffy about this place. But my personal opinion is: better here than in some greacy dating site filled with people who are waaaaaay to young for that stuff.
My parents neither know about DeviantArt, and if they did they probably wouldn't give a crap about it, neither of them are much into art. However I post my work on lots of sites, including my personal website which they do know about. I'm confused as to why you're worried about getting 'caught' posting your art here. Last I heard making art wasn't something to be ashamed about.