Can't say anyone I go with camps ontop of other groups, but people certainly try to do it to us. If not camp they will run through and kill any NM they are able to get ahold of over us just for the chance of a 100 piece. The worst I've ever done to someone else was kill them after getting charmed by an NM orc, but this was because they ran through and snatched it from the area we were fighting in.

In cities, it is hard not to camp on another group because some areas have so little safe spots to camp at. Dynamis isn't like Abyssea, you don't have refresh atma to keep the mages full on mp, you don't got regen or evasion atma to pull large trains. You find a camp and try to make it work with small saftey zones while trying to allow for room where your mage can /heal if needed. That means you typically end up camping right ontop of another group at times.

In larger areas like Xarc or glacier there isn't as much of a reason for it other than some spots here and there have higher NM spawn chances than others. This means you'll usually have to deal with others showing up on occasions. If you are a solo/duo/trio and a group of 6-12 moves in...well I don't know what to tell you. Either expliot the chance to have easier time to pull NM's or whatever else. Sadly this is the vision SE had for Dynamis and mass majority of the populace thought this was a good idea to appease "casual players" (no I am not one of the supporters of this change), but that is how it is now. Only thing I can say is deal with it or don't....all you can do at this point is belly ache and hope someone sympathizes with you ~shrugs~