Make a squad and cloud them too?

Those are contrary suggestions. In the picture you see the mag cloud. There's no bulk to attack, it's just a loose bunch of people whose sole goal is to kill members of your squad/team. If you squad up, they are going to run from every fight and pick off people off one by one via pulls and ganking that pulled person. If you cloud up, they are going to run from every fight and pick people off one by one via pulls and ganking that one pulled person. They're just there to gank people. There is no meaningful solution. They just get bored and log off.

you can't complain about them

I will. Spawn-camping isn't fun for anybody else, regardless of skill level or experience with wvw. Stupid stuff like having small clouds of people ganking anybody daring to attempt their dailies helps ensure that players new to wvw learn to loathe the game mode and dread needing gifts of battle.

Ganking is a serious structural issue. The cloud structure mag uses just makes the toxicity extra apparent.