I don't practice much ritualistic magick, other than sigils. So I simply don't tell anyone. They can't be weirded out by
not finding an altar with a pentagram network of multicolored candles; right? The only physical evidence that shows I'm into this stuff is the occasional sigil, and I usually find creative places to hide them. (Read: Open fields, mall foodcourts, ect.) Other than the online community, only one person knows I'm at all spiritual, and she only knows I do sigils once in a while. She actually doesn't even understand or know what they are...
Her: Kinda like sacred geometry?
Me: I dunno what that is, but probably...
Other than that, the only people who would know I was into this stuff would be hypocritical on calling me out on it. (Read: They'd be using telepathy to some extent.)
I don't bring it up, but if someone else did, I'd probably go with it. I had some really good conversations on Lucid Dreaming when I found out one friend forced them, but I wouldn't have ever mentioned them to him.