Hmmmmm. I was under the impression trains were only 'trains' if you're killing people via carelessness or people are dying because of them. /shrug. Because what's harm in a train not killing anyone?
The harm of trains on EQEmu is actually the fact that numbers over 10, especially in custom zones, starts creating a large possibility for zones crashes. Especially if you use AOEs like Rampage. I can almost guarantee you crash a custom zone if you kill around 15~20 mobs with Ramp.