Unfortunately, this one is completely true.
Double dipping drastically increases the chance of you or anyone else spreading harmful bacteria. According to Cassells, “It’s best to put dip on your own plate so that you can enjoy it without spreading germs to others,”
The best strategy is to take one heaping dip the first time, so that you don’t have to come back for another. If anyone complains, just tell them you’re making sure they don’t get sick.