Well, in my book, anyone clearing the beastmen keeping the trains at bay in those overpopulated zones is doing a good thing, regardless of what others think.
Helping out, keeping the zone safe is a very good thing. I agree.
There are nearly 100 different zones, while you can say the farmers go to another zone....so can those getting experience...and probably do a better job of it too...
The thing is, it is much easier for a high-level farmer who is soloing to move to another zone, or at least another area in the zone, than it is for several low-level parties to move. A single high-level player can completely ruin an area. All I'm asking is that if you are a high level, and you are going to train, have a little consideration for the lower level players.
I have only busted a train once.
I generally leave the trains alone as well. I've even cast Protect III and the odd cure on people who were training to give them a little help. However, if the train is getting dangerous, or is obviously causing problems for other players, or the guy buiding the train, I will gladly kill it.
The day of the PS2 launch, a few people were trying to train EVERY SINGLE ENEMY in Ronfaure. Here we have a massive influx of new level 1-5 players trying to level in Ronfaure, and there are 2 or 3 high level players gathering up every single enemy they can find because "it's fun". They weren't even killing them. Just standing there, letting the enemies attack them, denying those enemies to the low level players.
I followed them around and killed their trains repeatedly to allow the enemies to respawn for the lower level players. They finally stopped when they realized I wouldn't let them build a huge train.