I was in one vampire larp for about 2 & 1/2 years around here. It was pretty sensible, since it was started by a tabletop group who wanted to try something new. We got some strange people coming and joining, and a few people who started to go too far (ambushing my "character" by surprising me one night on campus and demanding to run a fight scene with my PC). The ST's quickly quashed that and kept the oddballs reigned in. The larp was fun, it ran it's course and ended, but I probably won't go back to White Wolf larping, it's too angsty and dark, definitely not my style at all.
The LARP I
like to play in is NERO (
www.nerolarp.com), which is a huge fantasy larp with over 50 games going on across the US & Canada (they got a big write up in Dragon magazine back in '91, which is what made them famous and got them to spread from a local game into a huge franchise). Each local chapter represents an area of the continent (a Kingdom, duchy, colony or whatever) and characters from any local game can play in any other. It's a "boffer style", which means we beat each other with padded weapons and throw little beanbags to represent spells (it might look a little silly at times, but it's a lot of fun). It is pretty high fantasy, and pretty obviously is meant to have a D&D feel to it.
There have been a few other independent larps, one-shots, convention larps and others that I tried. In general, and this is a huge generalization but I think it might fit, White Wolf gamers and D&D gamers are different groups largely. This is reflected even in the larps, where WW larps and D&D-style boffer larps have completely significantly different groups of people playing them with a significantly different culture of play. Somebody could enjoy both, but if you'd rather play a heroic knight swinging a sword at an orc you're not as likely to like completely immersing yourself in the part of some angsty modern urban vampire, and if you want some detailed plot and story about being an angst-ridden remorseful monster, you're not likely to want to spend your weekends at a campsite dressed in Ren Faire garb engaged in a simulated dungeon crawl.
To be honest, I think the animosity some people have towards larping is interesting, since it is probably similar to the animosity some outsiders have towards tabletop. They played with a bad group once and don't want to go back. How many people have we (as gamers collectively) scared away from the tabletop hobby because we freaked out a newbie their first time?