Oh Yes, very common problem
Yes. If not it will be a wet vent and cause MAJOR problems.
Yes, you can adjust the toilet clog to clause your toilet to overflow.
the water pipes of the 2 items are probably connected in the same pipeline. Poor venting or a stoppage down stream
Yes, a bad wax ring can cause flushing problems in a toilet.
Yes, plunging a toilet vigorously can potentially cause damage to the wax ring that seals the toilet to the floor, leading to leaks and other issues.
Yes, if the toilet tank screw is leaking, it can cause water to leak from the toilet tank.
wrong stuff placed in the toilet
NO way
No.
No. It can only cause problems.
Yes, it is safe to put toilet paper in the toilet before pooping. Toilet paper is designed to dissolve in water and should not cause any issues with the plumbing system.
it is connected cause the birds use to sing