If you're growing a substantial amount of plants and posting lots of pictures of them, I would say it's not too paranoid at all. If you're like me and you don't grow, just talk about smoking, then it's definitely more paranoid than I would be.
No need to be paranoid so long as there aren't any incriminating photos of you on here. And if the popo do knock on your door you say something along the lines of "Every story I've ever told here and ever will tell is all bs I say to sound cool"