Nexus Root Toolkit for Galaxy Nexus questions

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http://androidforums.com – so im talking about the program found here Nexus Root Toolkit v1.6.4 | WugFresh first i would assume that gsm/hspa is for canadians right. now the hole unlock bootloader and root thing is there any privacy risks like i dont want any roms or .img apps installed thats gonna track what i do. also when unlocking and rooting do i have to download any custom roms or .img file or can i just unlock and root the factory rom that im using.:D thx (General)