I'm going to give my blunt opinion on them, I also want to appreciate everyone entering the contest.
BHW isn't only about CS or CL phone verifying, so #3 (good design though) and #11 are out. #8 is made in Arial, that's out for me. #9 could be better without the strokes, #10 is a little bit too simplistic and associating with women although I can understand the sexy combination. #4, #5, #6 and #7 have some branding, but it's poor. Out of those though, I'd pick #6 with different lettering.
Now to the ones I'd choose. I would align to right the sub-title in #2 and make it 1 or 2 points bigger.
As for the 3 versions in #1, the first 2 are nice but don't work as well as the 3rd. This one has the title and the sub-title clearly visible and aligned to left. Most people will read from left to right and as they end the title their eyes will be directed to the sub-title. The hat could be a tiny little bit smaller so as to occupy a little bit less space from the "R" in "WORLD". Maybe try putting a space between "BLACKHAT" and "WORLD.
Another thing I notice here is how "BLACKHAT" is white, when it has nothing to do with that side of
SEO. With a couple of these small edits to see if it could improve its look, I would choose #1:
