Thoughts;
1) It would be NICE for those who USE tagging to track content
2) It would be irrelevant for many of us I think, as I DO often tag but never refer to tags to track anything. There are so many ways of tracking people, threads and comments it is all getting to be just a confusing muddle now. New, Hot, My Discussions, Contacts, recent posts etc. Sometimes cross referencing goes wild and the intent is completely lost in the redundancy. Ease of navigation is not necessarily over navigation. I was actually, not so much opposed, but uninterested in tagging when it was first discussed as I saw it being pretty redundant anyway.
3)One of TR's BIGGEST issues about having people be directed to post in the correct forum was that it would introduce an extra step in the process, not much sense there sorry, a simple sentence explaining questions go here and comments go there is not too invasive is it?
Forcing tags WOULD be that extra step you have been admantly opposed to.
4)You have also introduced a LINKS page already, now you are turning TR into a web portal. I NEVER login to TR when I am on another PC, I BIEW posts but don't reply, as the Login link works 1 out of 15 times for me. Even if I ask to be resent a password and paste it into the field, it still doesn't work most of the time. I just stay logged in on my notebook andone desktop, otherwise I'd never be on TR with the same alias twice. Having my web links just doesn't really interest me as I also use Novell's i-Folder and my links follow me around without logging into TR anyway.
So in a nutshell, and based on the above thoughts/conclusions, I think forcing tags would reduce their quality for one (hasty people just typing 'Windows' in or something), it WOULD add that extra step you have all been against, I don't know how many people actually would bother searching for tags, especially after they started finding all the tags that don't really focus on a discussion they are interested in. Just think how many tags will be Windows related and how many you would have to sift through to find a relevant Windows topic you are interested in, it would get boring VERY fast.
I'm not FOR tags, nor am I FOR links. I just find them redundant and useless for the most part.
There you have it and I pulled no punches, so I hope you don't feel I was having a go at you, it is just MY thoughts on the topic.
Note, if my use of the word redundant is a little redundant, then perhaps you will get the picture of redundancy I was trying to paint. :)