One member used to find dead or inactive accounts and positive rep them to allow him to swing around and neg rep someone he was miffed at over and over again. I can only imagine he did this because he did not feel most active members deserved a positive rep.
Also, there was one member in the past who had huge amounts of rep, at least, compared to most other members. Due to this, too many members were afraid he would neg them so let him get away with being extremely sarcastic as well as negging some members without a word against his actions, due to fearing a neg from him. This was when few members had more than 100 rep points which were hard won. After I saw that going on, I took it on to plus rep everyone who was being a positive member, or at least maintaining harmony in the group. I repped 10 people a day every single day for two years. I believe t this is probably why we have members with such high reps now. Today, reps don't mean what they used to, relatively new members, even new members who tend to be an arse can get 300 points in just a short time now. This has produced another problem, now we have part time trolls who can get a positive rep and the numbers keep growing, making the rep system rather useless anymore.