1) No problem at all. The free market economy is what makes Great Britain great.
2) No. I can understand why football touting is now illegal due to the safety aspect. But not concerts.
3) No it is not the richest, it is the most wanton.
4) Most fansites offer prime tickets to members. If you like the band/.artist, you will get to see them.
5) I couldn't really care either way as if I wanted to go to a show I would get a ticket by leagl means anyway.
6) I have seen David Bowie nearly 100 times on home soil and abroad. His tickets are like gold dust at times (even the iffy tours). However, I have never resorted to buying a secondhand ticket. If you are on a fan site, have your ear to the ground and know when the phonelines etc are open, you will get to see your act.
The only time I have ever purchased a touted ticket was for a Lou Reed concert in Brighton about three years ago. I was in town knowing he was playing and just went by to see how much the touts were charging. I actually got a good seated ticket for less than the face value. Whether he made a profit or not, I do not know. Ergo, I am all for them.
I also sold a pair of U2 tickets once for little more than face value. I gave joy to a couple of fans that I found rewarding.