As the jokes are now flying thick and fast, how about a rating system? I suggest -

1 Smiley = Mildly amusing

2 Smileys = Got me smiling

3 Smileys = I laughed out loud

4 Smileys = I'm still laughing.

5 or more Smileys = Excuse me, I must visit the loo....

You're naturally full of generousity and kindness. What about the other range of comments, such as stale, mysogynistic, racist, or a limp rehash? There have certainly been some very funny ones, but if the only permitted comment is praise, one might as well be a journalist on a state-run communist newspaper.