Reverse DNS look for my static IP

[#1]

I've just realised that the reverse DNS lookup for my static IP (lookup of my IP Address in DNS) reveals my plusnet username! It is basically <myusername>.plus.net
This is unacceptable! I dont want my username revealed to would be hackers, it is a security risk
How do I get this removed or at least changed?

[#2]

Hi sukeshn,
I can change it so that it has your IP address if you'd prefer?

[#3]

Yes that would be ideal.

[#4]

No problem. I've submitted that for you, that should take effect within the next 4 hours.