Asmoday,
Just read your beginner's guide. I'm not really happy about it. It's.... kinda evil
What I mean that it's not wise even to approach dark entities and to play with sigils and stuff, even if you say that it's safe (I hope there's not any hidden intention from you to say that, however your phrase "welcome to the dark side" makes me think the opposite). It's like saying "drugs are dangerous, I warn you, but try marijuana - it's safe".
How do I know? From my experience. I know a feeling of dark energies. They're not mine (not for me). A quick glimpse on the sigils was enough for me to feel the presence of demonic entities. I can't even imagine myself sitting and meditating on that stuff.
Maybe it is safe for an average skeptic. But certainly not for me. I easily catch energies, and perceive them by feeling. And when I "researched" some dark stuff like black metal - I actually heard some demonic voice and felt some draining during night sleep back then. That may be the reason why those sigils "capture" me so easily... well, thanks but no thanks.
I'd like to hear Erin's opinion about this stuff. And I'm still interested in getting answers to my questions.