niknak,
My client has instructed me to politely inform you that he is well aware of your client's status and has no desire to 'purloin' his initials, hence the use of '-HD-' as being clearly separate and different from 'HD'. Furthermore, by your own admission, our respective clients names are 'similar', ergo not the same. Furthermore, my client has no wish to use, nor indeed has any knowledge of 'Pprune'. I demand you allow my client be allowed to enjoy his use of PPruNe without further let or hindrance.
Sticks and stones .....
