Hello,
I have taken a look at the abuse report and as annoying and frustrating it can be there isn't an actual rule stating they can't do that BUT I will be expanding the
5.1 Cooldown - Do not raid the same base twice within 10 minutes. This doesn't include Nuke's and Bank Raids! rule this weekend to prevent stuff like this happening. They could of been active the whole time but I do see your point as it can be come unfair after a while of doing the same thing over and over. This will be denied and I'll think of an update for this weekend for the rule so its fair on both sides of the raid.