Yes. Learned this the hard way. Asked for a familiar, was taught to create a thoughtform shortly after. I forgot about it and it bit me in the ass.
The objective was for this thoughtform to automaticallt deter those of ill intent and, this is where i fucked up, those who cause me negative emotions.
Shoulda thought about being more specific since it eventually started to not like my girlfriend who has severe depression. Thoughtform or familar, whatever you wanna call it started giving her nightmares, knocking shit off her table, every time we would fight shed start hearing footsteps and call me that night because “shit is shaking and flying off my nightstand”
Ive yet to figure out if it has a will of its own. Talking to it and reprogramming to help us work through our issues has seemed to help. Now when we fight positive things happen.
For example) we fought a few weeks ago and an “i love you” letter that was written in a card rotated counter clockwise 90 degrees which caused the card to open. My gf said “it was to remind me of whats important” so it seems like it likes her now.
I dont mess too much with familiars so forgive me if im completely off topic but i wanted to share my experience.
My solution was to reprogram it and imbue it with green/gold energy to hopefully direct it more towards healing and protection.