Let me guess at the running times of these shows. I don't watch them, so I'm projecting. Feel free to correct me.
Sabrina - .5 hr.
Charmed - 1 hr
Angel - 1 hr
Buffy - 1 hr.
Pokemon - .5 hr
Power Rangers- .5 hr
Any 'reality' show - 1 hr
Now, let's assume you had to watch each of these shows a minimum of 3 times to be able to state unequivocally that they are crap (with the exceptions of Pokemon and Power Rangers; those are accepted as crap on first viewing.) That is fourteen hours you have spent watching crap. Multiply you by howevermany people watch these shows and decide they're crap: that's a lot of hours. Add in the people who watch them over and over, that's a lot more hours.
Conclusion: Americans watch a lot of hours of crap. What the heck did we ever do without TV?