New Tags

If you have nothing to contribute why do you have to know what you're not seeing, since it's already something you're not concerned enough with to bother engaging?

Let's take this thread for example: I don't usually post because most of the things I want to say have been said before (and probably better put) by other users. Under this new function, even if I'm interested in the discussion I will still have to post just to find out what people feel like arbitrarily hiding. You hid text in your opening post for example (examples within examples, gotta go deeper) and as a user of the site I'm interested in changes to the way the forums work, but that doesn't mean I go posting in every thread you make an update. Now I need to post here to make sure the reply you "hid" isn't anything too important.

And what happens when people start using this in threads that die out later? Let's say someone uses this in a thread that hasn't been posted in for a few months, or even a year. Anybody who reads that thread in the future won't be able to see the content unless they necro a thread that most likely has no business being revived. People are going to start posting in threads to view hidden content whether or not they have anything productive to say and even if you make some rule about posts reviving threads needing to have some kind of relevant content...well, it's really not that hard to pretend you have some "new" information that just so might happen to not be new or true at all.

The Hide-Vote one would work perfectly though, voting in a poll doesn't bump the thread and people could use it to force others to make a more honest choice rather than reading the thread and voting after. Not like it'd really make a difference, but YMMV.