I was thinking of a little experimentation whereas you would get a video of a sigil but tell people it will have hallucinogenic effects.
You can make the sigil solely for yourself. Make the video go viral and have them stare at the sigil until tears come out.
This way, you can make a ton more people charge a sigil without them knowing the real effect of it, but subconsciously, they are charging it for an intent of your choice.
Due to them not knowing the true effect of what that symbol on the screen is, they probably won’t go back to the video because there was no hallucinogenic effect and they also don’t know the true desire of it.
This allows them to forget about it instantly.
It kind of works like what we would call a botnet whereas a botnet would be something to take control of tons of computers to use to power a denial of service attack, a sigil charged by millions of people will have sort of the same effect. This is an effective method by all chances. You could even just have pictures of it around your neighborhood and people will be staring at it to see what it means.