Why can't we be able to hide 'Network Trash Folder' and 'Temporary Items'?

WD Legacy Products My Book Live
7

I am okay with hidden folder, but this two folders are bothering me because they can’t be hide. I had another seagate external hard drive filled with movie as well, and was being accessed by pc and mac as well. Mac always gave it some new folders. But those folders I had no problem to hide it…