I had a question I havn't been able to really find the answer for. Would it be possible for a human to wear Tau armor?

The reason I ask is in my campaign, there's a planet with a great deal of tension between Imperial forces and the Tau. There's an Imperial diplomat negotiating with the Tau in order to reach a cease fire to allow both forces to concentrate on the Tyranid threat, but there are several factions trying to prevent that. Would it be possible for a small human to wear Tau armor, in order to be seen in public firing at Imperial supporters in order to start a riot and an ideological war with the crowd?

I would say that appropriate sized human could wear Tau armor for most parts but as the Tau have hooves for feet the human would have to improvise there. If I recall correctly Tau also have four fingers so human made gloves would be needed. That said nobody would probably notice an extra finger in the chaos and if the human fired from some sort of cover his legs would be unnoticiable.

The basic idea is that a chaos cult is being assisted by the Alpha Legion, so obtaining resources and supplies will be relatively easy (truly horrific stealthy Chaos marines with a penchant for over-complicated plans). He only needs to look Tau from a window, fire a few shots very publicly with a few compatriots, then dive for cover and disappear. They'll probably also take fire from the crowd and leave behind one or two actual fire warriors (killed by volleys from the weapons the crowd will likely carry, possibly by small explosives).

This should leave several options for the characters, whether they investigate the actual happenings, join the crowd in shooting down the pro-Tau traitors, or do their best to calm the situation.

Looking at their feet, I think it wouldn't be too hard to fake it for just a few minutes either way, but it shouldn't become an issue anyway unless he gets sniped as soon as he fires by a player. I'll think about what they do and we'll have to see if the players manage it.

Sound like a good plan, firing from windows would definitely work. If the players witness the shooting they might storm the building and prevent the humans fleeing even more likely so if they have jump packs. This might spoil your plans and reveal the humans plot too soon. Tau bodies left behind would need to be resent or they wouldn't fool the players especially if one of them is an apothecary willing to examine the bodies. Of course you could use livng prisoner(s) excecuted on the scene.