Sounds like the kind of thing people bodge together when they want to either a) ride single speed on a track bike (idiots) or b) trying to avoid local laws about riding without conventional breaks. With a front brake they are covered in English law on a fixed gear, as leg braking counts as one. However, if it is a pure track bike, without a drilled fork, fixing a weird rear brake may be the only way to legally let it out of the shop.
The person might just have not taken it off yet. I guess that sounds plausible, but without pictures/accurate information, it's hard to say.
Sounds like the kind of thing people bodge together when they want to either a) ride single speed on a track bike (idiots) or b) trying to avoid local laws about riding without conventional breaks. With a front brake they are covered in English law on a fixed gear, as leg braking counts as one. However, if it is a pure track bike, without a drilled fork, fixing a weird rear brake may be the only way to legally let it out of the shop.
The person might just have not taken it off yet. I guess that sounds plausible, but without pictures/accurate information, it's hard to say.