Rules says you can't stay longer than 30 sec in the same spot, but sometimes can happen that someone keep going in the same spot the whole game and get also warned as we can't count each second.
With camping, we don't mean waiting for someone when you hear them coming.
This only applies if the culprit continues to stay in 1 spot for a time longer than 30 seconds.
And a “spot” can mean a house, a backyard, a train. In general, just a small area. You got legs at birth, so use them.
1st Offence: Warnings, eventually leading to a Kick
2nd Offence: 1 day ban
3rd Offence: 1 Week ban
Hope my help has been usefull.