What a douche! weaponising kissing is a great way to put it. PA twattery in the extreme. After all, who can object to a kiss, 'he's just being nice', how unreasonable you are etc - clearly he's just pissy that your'e still asleep and wants to make sure you're not. 
Absolutely not unreasonable of you to point out that being repeatedly woken up is annoying. The only unreasonable thing is that you've agreed to him waking you at all! How about he kisses you goodbye at night when you go to sleep and then leaves you the fuck alone in the morning!?
Agree with the poster who suggests if he does it again or makes a fuss about it, you wake him up with kisses (or get the DCs to kiss him when they come in) throughout the night, just so that he can see what a selfish tosser he's being.
My DP prides himself on "ninja-ing out" without disturbing me in the mornings if he has an early start and I don't. He can go back to sleep in seconds, but he knows that I can't - after many issues around it in the early days he's learned that I don't take kindly to unnecessary and repeated wakings, so he's careful to turn alarms off quickly and wouldn't dare kiss me as he leaves. I also wear ear plugs (due to his terrible snoring) so I can sleep through anything these days!
If you want to be nice about it, you could suggest he leaves a note or texts you (with your phone on silent!!) to say goodbye, but really there's no need for it.