wifi signal boosters steal from others bandwidth?

One of the big issues is the wimpy transmitters in laptops and hand held devices. The transmitter from the hot spot probably has more power and a much better antenna and location. The wimpy ipod just cannot transmit back well through metal skins, trees, and other rv's. Getting a good antenna on a usb stuck to a window can greatly improve performance. There are tons of other options including as mentioned repeaters. I probably have one of everything. The newest toy is a Nano device. It smokes.