my jeans have 'refuge R' (refuge = brand name) on the back of the waist band. it's not completely obvious since it's on the band, but it's still fairly large (height of the band, goes across most of the back).
i saw some dodgy ones a couple of days ago (i think it was tightrope) which had small-ish writing on the front of one leg just below the pocket and then had this fairly large (10cm long?), really ghey sticker promoting the brand over about 1/2 of it. i guess you could peel it off, but it just looks really stupid having the sticker there. it reminded me of the photos of last year's bos stall (uts i think) with all the girls having bos stickers all over them..but 100 times dodgier