Joining coalitions should cost prestige and/or power projection

[t6.28]

I think it would be logical, if joining a coalition against another country would make you lose prestige and/or power projection. That would be realistic, since joining a coalition basically means admitting that you are scared of that nation and can't take care of yourself.
It would also be helpful game play wise, since it would prevent countries from joining coalitions that they totally don't care about, just because they can.

 

[Woifee]

Or it means I'm an evil mastermind using the others asmy minions to reach my goals.

 

[funguide]

There should be an option to form defensive coalition only.