And this is why I am playing Travian.
xD If somebody is sending an army after me and I clock it, I'll either ask my alliance for back up or spend most of my resources on upgrades and send the troops for a 'walk' and send the resources to be given to one of my villages that are not currently being targetted. It results in the raider gaining nothing. :'D
Unless of course, they're attacking, then I have to answer that with force since they could do damage to my actual village :o