Certainly not silly!
You see, psychedelics/meditation expand your aura. This is a common practice, every solar equinox there is a global meditation, and i'm certain there are many more, like at 20 april, or more subconciously at 4:20 every day you got people relaxing in the same time zone as you.
Meditating/tripping in group can be so amazing. Personally there is a big change in energy levels around me and inside of me.
It might not seem illogical that astrological allingments also influence this kind of energy