No. Installing technic pack is completely safe. Just make sure you download it from it's offical site.
Private Mod Note
Rollback Post to RevisionRollBack
Length: 27m (Might not be final)
Height: 7m (Might not be final)
Personality: Friendly unless provoked. Sometimes a bit playful. He's not just some brainless killing machine. Most of his actions usually have some reason. He avoids killing other living beings as much as possible.