Hi, back from vacation,
but not "up and running" already
Okay, let's try though ...
princeedward, or should I say "your royal highness" ?,
that means, you can now choose if you want to have the hints ("you have to reply/thank to see hidden content") showing up as regular text or images (see last image in first post)
bbf,
to make it short : I won't

Sure it's possible though, adding some more lines of code maybe adding
a sql-query to ask for the timestamp, that's generally it I guess.
But in fact, I don't want that to happen!
And that will only show up hidden content after that time, but will not prevent hidden content to be seen after posting or thanking ...
If you like drop me a PM, I'll see what I can do if you won't find a hack that fits your needs.
All others: thank you very much!
'sid