Does your account username matter?

[Troglodactyl]

Your account name will be visible to anyone to whom you send funds, so if they know you as "islandking", and you don't want to suggest that you're the one sending them money, don't send from an account named "islandking".

TITAN manages privacy for transactions, so the transactions won't be tied to the username as far as snooping third parties are concerned.

[islandking]

Does it matter what your account username is? Does this compromise your privacy?