Any body falling into a black hole will get completely destroyed. There is no such thing as an absolutely rigid body; a "rigid body" is an approximation that may help with some calculations, and such an approximation is valid (i.e., it's a good approximation) under certain circumstances, but a body will certainly not remain rigid under the extreme circumstances of a black hole.
No - should you fall into a black hole (which is very unlikely to happen), you would get ripped apart.
If you were to fall into a black hole, the extreme gravitational forces would stretch and compress your body in a process known as spaghettification, ultimately tearing you apart. As you move closer to the singularity at the center of the black hole, time dilation would cause you to experience time differently compared to someone observing from outside the black hole. Ultimately, you would be pulled into the singularity, where the laws of physics as we know them break down.
it may damage them and the working of a lot your internal systems due to their harmful effect to the body.
Basically, the same thing can happen as if something gets too close to the Sun, or to a planet: it can fall into the black hole (or Sun, or planet).
If you happen to fall into a body of water (or if someone throws you in) while you are asleep, then yes, you could wake up drowning. This doesn't happen very often.
spaghettification takes place with you ( the process by which an object and in this case you would be stretched and ripped apart by gravitational forces )
What will happen depends on how near you get. If you cross the event horizon, you will fall into the gravity well of the black hole and life as you know it will be over. You will disappear from the universe, never to be seen again.
Fall of Elam happened in -655.
Fall of Philadelphia happened in 1378.
Fall of Harran happened in -608.
Fall of Antwerp happened in 1585.
Dark Fall happened in 2002.