Hypothetically, let's say your BFF[lyk,ong!]'s account gets iced. What should you do? Well, you really need to contact a UA about this.
The contact link at the bottom of the page on Subeta doesn't work, so sMailing is your best option. Explain the situation. If your friend was frozen because they were cheating/hacking/breaking rules... then they deserve to be frozen. If their account was hacked/entered by a third party/unfairly frozen, then explain the situation to a UA (User Admin).
LAWL.
Ever want a really good pet name, only to find out it hasn't been taken, but when you go to create it, it's already in existence! Well.... frozen pet names need to be manually deleted, meaning a Staff has to go in and delete the username/pet name. This takes time, possibly years! That Staff already have their hands full, so be patient and the name may become usable in this century..