As a quick answer: why not, we have to think a bit more about which rules to choose for the WoT.
But to be a bit more balanced, here is a little paragraph about max. distance rule which may already help us.
The max. distance rule
Any member must be at maximum n steps from any other. That is, if we have a -> b -> c -> d, then d may join the WoT since it is recognized by a. But a e individual could not join if we only have a d -> e, since e would be distance 4 from a.
It seems n = 3 is a good tradeoff to have communtities of ~100k members. Over 3 might be difficult to still have trust, but this is another debate.
Requires distance 2 members
Anyway, making fake identities with such a rule implies the fake identity to be signed by members with distance 2 from other members, since signing someone adds a step for others. So, such cheating people have to be step 2, or at least find others step 2 which will accept to sign the fake identity.
Is combo with signature delay
But then you also have the other rule avoiding signature repetition in a given period. This would imply cheaters to find other people to participate to the cheating.