Its basically internet bullying by trolls who have nothing better to do with their lives.
Thats at least 5 players, each with huge amount of cities sending meaningless little spam attacks that only have one aim to cause as much personal misery to one individual. Most respected alliances have the skill and the moral compass to employ acceptable means to take a city, this is just as many silly little attacks as possible to bully the guy into submission and to cause as much misery as possible.
If you want to take his cities then you are a big enough alliance to do it like most respected alliances do rather than stoop to such a petty way of playing.
This game is played by many minors, kids that are encouraged to play the game, many put money into the game , a game which can become very addictive. It also raises an abuse question here where single players (some maybe minors) are just being targeted by groups of players intent on just causing them as much personal misery as possible.
Innogames seems to have no qualms about more and more individuals having to suffer this cancerous form of internet bullying/abuse, irrspective of the age of their player base.
There are all kinds of knock on efffects including mental health, you would like to think that If innogames are going to encourage minors to play their game then they have some kind of responsibilty for protecting those players from online abuse/bullying, but then maybe they really don't give a **** as long as the money is rolling in?