100quid gets you 5 channels all on bunny ears, they enforce it with scanners and hand-held detectors. they're getting pretty smart these days.
you pay the 100 regardless of whether you get cable, the licence fee goes to the bbc mostly and pays for all its programming, radio, digital stuff, world service, and web sites etc.
to be honest i think you get pretty good value, bbc had no ads and makes some of the best tv in the world. they're independent, not owned by shareholders or government so have the freedom of the media and are generally unbiased much of it is pretty high-brow programming.
channel 5 is a bit of a joke in the uk to be honest. if anyhting is tacky or sleazy it's referred to as channel 5 material. for a long time it was known only for showing bad soft porn on friday nights.
it's improved a lot though, it bought up a couple of good soaps, shows reasonable films and is getting a reputation for good history documentaries.
it still has the lowest market share, bbc1 and itv have the biggest.
bear in mind our cable and sat aren't as well priced as yours. i have basic cable at £15 a month [$20]. for then i get about 5 extra channels [sky1, e4 and ukgold are the only ones worth watching too]. for a fuller range on satellite [sky] you'd pay £40-50 and still have channels you'd have to pay more on.