Your advice is pretty bad. Training thieves won't keep dedicated t/ms out, WTs will only slow the loss rate.
FGing banks? That's kinda dumb -- the kds only raze when they have no imminent conflict. Yeah, I had 100M FG'ed off my prov yesterday. I can generate that in under 24h, who cares? Same issue with FB. and of course, you know... WPA. The top tends to have much better WPA than the bottom.
For example, the kd we hit, we're core-core landlusting with 50% success since they gave us unfriendly. So we're pretty happy with that.