And personally, I don't think it changes the mood. Maybe its the type of person I am. I dont live in fear but I'm very cautious. Adventurous, but cautious. Like, I very much enjoy gated communities. That little extra barrier of protection is good in my eyes, regardless how effective it may be. It's more effective than not being in place at all. That's why to me personally, seeing metal detectors or other extra security at Universal wouldn't make me uncomfortable or give a bad atmosphere.
But I see everyone's points