There are currently 9,409 profiles with the surname of Anonymous. Some of these are deliberate, but many are generated by Wikitree itself.
If you remove a name in any of the name fields, Wikitree automatically generates the name of Anonymous, unless the name is replaced with something else. Sometimes there is nothing to replace the name with, or no name is needed. Sometimes profile managers are unsure how to fix the problem, sometimes they may be unaware of the problem.
Whatever the reason, the number of Anonymous profiles is going to proliferate by something which Wikitree itself is producing. Surely this cannot be acceptable, to actually input a name for someone, where none exists?
This, I feel, gives Wikitree a less than perfect profile to the world.
Edited with link to an example profile