Ravnos & Eerie Presence
V20 core in its original form sets the clan up to inadvertently stir negative race-based stereotypes into their clan identity. We don't really want to deal with that. Some players may not see it the same way, but it is the way we see it, and we frankly just don't wanna screw with it.
The Ravnos clan flaw has been replaced by the effects of the Eerie Presence flaw (+2 difficulty to all social interactions with mortals). The Camarilla remains less than wild about the clan, owing to the stress they collectively present to the Masquerade as a vampire that somehow sets off a mortal's instincts.
Ravnos characters cannot take the Eerie Presence 2 point flaw, just like how Brujah can not take Short Fuse and Nosferatu can not take Monstrous.