[Despised]

I've offered the idea of hide tags in the past. Depends on if it is wanted.

Assuming this would be added, regular users would try to refrain from posting in the ebooks and tutorials section to maintain a "non-leecher" reputation. (Simply view post-activity)

The next thing someone would suggest sooner or later, would be a feature for users with a specific upgraded rank or higher to let them view hidden content without having to post.

Just a side note, the Platinum and Diamond rank could need a few more perks.

Do I want it? If it's good for SL, sure.

I've offered the idea of hide tags in the past. Depends on if it is wanted.

Would the hide tags only be for guests, or for registered members as well?

It's been a while since you asked this and no one replied, so I'll just answer.

I presume it will require registered members to reply on the thread before being able to view the hidden content.

As of right now, guests are only allowed to view 5 threads, then will be prompted (and have to) register to view another thread, without cheating that is.