SR does have a hole to fear but it is not that big of a deal. Not a lot of things have fear and also they need to hit you too so it is not bad at all. I have 2 lvl 50 SR and didn't know they had a fear hole till I did some PvP(back in I10) and I kept getting Terrify and didn't know why. So you mostly likely will never see this hole come into play.
"All right, they're on our left, they're on our right, they're in front of us, they're behind us...they can't get away this time"- Chesty Puller US Marine Corps
SR had some of the most complete mezz protection back before new sets were added, and before the change that lets defensive toggles stay on while you're mezzed. It's the combination of the later toggle suppression rules and the new sets tending to have some exotic mezz types added to their protection that makes the older sets sometimes look incomplete, that's all.
If we are to die, let us die like men. -- Patrick Cleburne
----------------------------------------------------------
The rule is that they must be loved. --Jayne Fynes-Clinton, Death of an Abandoned Dog
I don't think any of the scrapper sets offer protection against fear, do they?
Dark, Willpower, and Shield Defense all give Fear protection
Ahh, good to know 
yeah, the only time I've ever been afraid was fighting Jick-in-Irons think he has an AoE fear.
The more people I meet, the more I'm beginning to root for the zombies.
I got feared fighting the weakened Hamidon in the LGTF, presumably the real blob would also be a pain but then again I wouldn't be without help.
Fear is very rarely used and resisted, by both players and NPCs. It's a very effective soft mez for that reason, ask any Illusion controller.
Yep, fear is not really a concern. Most of my high lvl scrappers including my SR's carry a breakfree or two in any case I'm dumb and forget to retoggle Integration after dying, to click Practiced Brawler or whatever, and if I can't just wait out the "Terrify/Terrorize" effect I'll use one. Ghost Widow (various versions), Weakened Hami and Carnie MI's I've noticed Terrifying me from time to time. Outside of them nothing else does it often enough for me to even recall it if it happens.
I'm a little confused here. I'm still new (my only character is lvl 18 Katana/SR) and curious about the mezz protection for an /SR scrapper. I have Mid's and have tried to spec out my build to 50 and noticed I have a lot of gaps in the Mezz protection (like none for fear). Does this end-up being a big deal? I mean, I realize with SR you'll dodge a lot of attacks but no protection seems problematic.