I can see where someone might be upset over this. We have sent over someone many times before, and likely will many times in the future. I know when we do it, though, we make it clear what is going on from the get go. There are many positives for both, as well as a few negatives for the incoming.
A) It sets up a line of communication for future battles. If it ends up being a great war and you guys wish to do it again, this sets up a way to talk in the future whether its Facebook, LINE, Kik, Wechat, etc. With the current state of matchmaking and the ability to stack bases the way some of these 'best' alliances are doing, it makes being able to do this even more important. The only guaranteed way to do it is to send someone in.
B) As stated by
JuDomines it does allow you to view War History. While some look to view at results some may prefer to look at opponents. Please see note A as to why this could be important.
C) It can help with recruiting active players. When I say this, I must make it known that recruiting active players and poaching active players are completely different. Often times we have seen an alliance only make 10 attacks w/ 2 or 3 people(out of 25-40) that are putting forth effort. If an alliance has the space and doesn't mind, it would almost be a disservice to not extend an olive branch, followed by an invitation. In our scenarios like this we didn't go in seeking 1 or 2, we extended open invitations so all who wished to come could. We would never do this to an active alliance!
There are a few negatives as well. Approaching it as a 'spy' operation basically explains it all. If it is done with toxic intent there is no good. Running in and blatantly attempting to recruit is a no-go. Trying to figure out battle tactics or whatnot is a no-go. There is no use figuring out the placement of traps, because any good alliance will spot that immediately
So, be as it may, I am all for sending someone over. But not to spy. To play devil's advocate, though: We welcome spies with open arms. Come to us and try to figure out what is going on. You won't want to spread the information you get from your visit. It will not help you nor your morale.
Glory is a good indicator or activity now, coupled with donations. That is enough to see if you're in for a match. This is just my view from the cheap seats.
We want stars, we take them!
Ambria of Eminent Domain