It's interesting that facebook got it initially right, and NEVER implemented 'who's viewed your profile/picture' - as they know that this (possibility of others seeing our actions) would greatly reduce our actions/viewing (us fearing it being visible).

WHILE now, they're not getting it right and publish our actions (likes/comments) like a mad spammer.

It looks like they crossed the border while playing with our curiosity what-others-do, but forgotten that this means, that our actions need to be revealed to others also which will make us reluctant the moment we understand implications.

Snow ball effect to come?