do a transaction and try to figure out the source, it is not difficult.
Isnt this the definition of not anon? Hoping you meant 'it is difficult'
The system uses random nodes to create multisig address, so when there are enough participating nodes, you will not be able to pinpoint the source.
Or is this to say that when the supercoin network is large enough, the level of pseudoanonymity will be heightened. More potential random mixing nodes = higher difficulty in discerning sender.