Yes, it's odd that some firms seem to forget that equalities law applies to this sort of thing, and health and safety.
place i used to work was very hot on health and safety box ticking (i don't think they seriously cared whether we lived or died, just so long as they couldn't be sued either way) and you were hardly allowed out of the office without a risk assessment, but they sent the graduate scheme people on some sort of outdoor activities thing as part of their scheme.
About the only serious suggestion on here that sounds halfway sensible is the idea of going out and doing something useful in the community / local environment, but even then there's issues of h+s and equalities (for example if you sent a bunch of office workers out to clean up a local park or something.)