Yes you wear them under your socks and your socks go over
Shin guards are worn under soccer socks because the socks keep the shin guards in place, right in front of the shins. If the shin guards were worn on top of the socks all shin guards without straps would not remain on and even those that have straps that go around the back of the leg will not keep the shin guards in place.
it doesn't really matter but i prefer them over my socks
Because they wear shin guards and most of the shin guards go down to your ankles.
they became legal in 1987 after the world cup when people used to go in stupid challenges
Try looking in a dustbin. try lookin in the tip.
Sharpie marker, engraving tools, or get it done professionally. go to your local sporting goods shop and ask there.
It depends on what brand name you choose. Balls are reasonably cheap, and shin guards aren't that expensive. Boots can be expensive but you can get cheaper pairs. Club shirts aren't too bad, but any shirt would do and same would go for shorts. Socks are not expensive either.
the socks end up under the dryer
Yes. Preferably no show socks, below-the-ankle socks, or knee socks, but any other kinds of socks just don't really go. Converse can also be worn with leggings or tights under a skirt or dress.
Although the injuries from not wearing shin pads would be very serious, such as broken ankles and legs etc, they would be few in number, this is because no referee or coach at any level would let a player go on the pitch without shin pads.