Scamming
Scamming is the art of stealing or tricking people into giving you there Items. People scam by doing things called Drop Games these types of scams involve in other players dropping valuable items like world locks or other and than the owner will block of the items they drop these scams are the second most common behind Quitting scams. Quitting scams are just that people who say they are going to quit but don't it's just a more believable drop game and remember don't fall for these tricky scams.
Trust challenge is a special scam, where the scammer asks people to drop items. He/She will get them and give back to make you trust in him/her. When the player drop an item, which is pleasant to the scammer, he/she will ban this player and get this item.
Friendships also can be scams. A player asks people to add him/her as friends. The scammer make the players believe, that they are friends and there are nothing to worry about. Then he/she will ask access on the lock. When the player will be offline, the scammer destroys the whole world and get the items. The he/she will delete the other player from the friend list. You should NEVER give access to random people/new friends.
World with rare items is an other type of scams. The scammer will /bc something like: I sell world, cheap, RARE items here, COME FAST.... etc. He/she will show the player the rare items and then pull him on a different place to trade. Before the trade, an other player with access will steal the items. After the trade, the player with get a world without any rare item... Always trade new to the rare items!