Is that to stop them throwing them?

Lack of demand I think. You'll probably find that most of the people who need seats tend not to travel to away games, as the provisions most of the time are different to those at their home stadium.

It would actually be interesting to know what percentage of fans who travel to the HJ usually are from seated areas of their home stand and what percentage stand on the terraces. I'd put a quid on the standing fans bringing more.