Some good contributions from everyone in here.
For me the issue isn´t one of newcomers, regulars or every-now-and-theners. I think most of us agree that we could do entirely without the out-and-out tourists who have clearly paid well over the odds and put a load of money in the hands of a tout (who we could very obviously do without). I mean the stadium is big enough that there should be enough space for a couple of thousand out-and-out tourists to get tickets via the regular route, and I wouldn´t have a problem with it. What I don´t want to see is out-and-out tourists sat up in the £9 L-Postcode section, knowing they have probably paid at least 10-15 times the odds and denied one of the 500 seats in a stadium of 51,000+ set aside for locals. But again, that is the fault of touts, who are most likely local....
Regarding the passing on of tickets, of course it is better they are passed on then the seat simply not sat in. Indeed, if it wasn´t for tickets getting passed on, I´d go half as much as I do now, because getting tickets through the General Sales is practically a none-starter most of the time (and, as has been noted, almost never for League games). I do think if you have a season ticket, you should be obliged to personally attend a certain number of games, however.
But all that aside, I simply don´t see anyway of changing the atmosphere or getting a new generation on board within the confines of the ticketing system. For most people, and especially potential-young-regulars without connections, ticket sales are basically a closed shop. For me, the only thing that would consistently change the atmosphere and get a whole new generation in, is 10,000+ (let's say the whole Kop) tickets that are set aside to be bought in person and on the day. First come first serve, as it used to be. That way if you rock up with a group of mates, and you are there early enough, you can sit with your mates - and even if you are separated, you are in a stand with likeminded people. Not to mention it would have to be affordable (say £20 a ticket)
However, I also know that simply won´t happen. Aside from the logistics of it around Anfield, the club aren´t going to want to sacrifice the guaranteed income of pre-bought tickets. Which is why Anfield will only get older and older.