PvP Message System + Clan Practice Attacks

What would everyone think about incorporating a message system into the game, where you can send a message to the person that attacked you (only one message, maybe a couple sentences), at the completion of the attack?

Also, I think it would be beneficial for lower level clan members if there was an option for "practice mode" attacks. Where you can choose anyone in your clan, and attack them with any layout of troops (# of troops according to how large of a camp you have). This could open up the option to work on strats and base layout attacks for future raids.
If not for free just within clan, then perhaps if you want to have a practice attack on a clan member, then charge a certain amount? 500-2000 gold?

Thoughts anyone?