stinkbugs

r they a threat to buds, and is tabbacco safe to spray on MJ

Nope, they munch other bugs, especially caterpillars.

You CAN use tobacco juice, but it isn't a good idea on mj. There are a billion other organic options, like pyrethrin (for soil/fungus gnats) and neem oil (white flies, spider mites).

Whoa a lot of rep lol...and some are carnivorous and others are crop feeders, im wondering if the vegetarian ones are harmful?

Safer makes a product for 'em. As stated some are predators like lady bugs.