I just tried adding it to /r/safenetwork:
It looks very good!
I like that we don’t need to remove the Reddit logo and “safenetwork” link that’s on the left (for @suriana’s banner, it looked better when we removed it). It makes it easier to go back to the front page of /r/safenetwork.
EDiT: It looks like it might be possible to make the banner link back to the subreddit (e.g. see this Reddit post). So this means that it would probably be fine to remove the Reddit logo and “safenetwork” link.