Lots of opinions and comments here, but did we answer OP's question? She wants to go to a presentation and wants to know how to clear the do not tour on her account.
Here's what I can say on the topic.
* I don't think it's the resorts controlling the flag nor do I know who does.
* There are multiple flags, I don't know the codes. But yes, you can (as you know) be flagged to no longer tour
* I for the most part, am not invited to tour. Sometimes I am given the parking pass at the checkin desk and don't even have to go to the parking pass table (nice). Almost always, the resort staff is as nice as can be, gives me the info on local restaurants, activities, etc, and sends me on my way.
* Don't be shy - ask them what the flag is. They may not know much about it, but they can tell you your code.
* I think once you know the code, you could call Owner Services and ask about it and see if you can get it removed. It's gotten harder and harder to get through to Owner Services, hopefully you can.
* I don't know why I was flagged (but I do have some resale added to our developer VIP Plat, also a few other things have happened).
* I have toured, even since being flagged. I suppose that was up to the resort. The update was not bad at all, very nice - if I remember correctly, the salesperson also had some resale. So, you can ask and maybe get an exception. I also did an update in Panama City (was ok). I also had someone come to the room, another time, in Panama City, did the update and left a gift. I went to workout (left my sister sleeping) - he came back and retrieved the gift while I was gone (I'm sure I would have given it back, too).
* At Indio a few years back I tried to tour and they wanted me to tour, and tried to get permission, and it was a no go. Not sure who was saying no, but I know they tried their best to get me scheduled.
* As a rule, any owners on the account are treated the same way. But my nephew was asked at Nat'l Harbor last year, sister toured in Pompano Beach about 2 years ago (can't remember which resort). Guests are invited to tour - not sure if it's all the time, but for sure more than owners.
It is really nice not asked to tour, but if you want to, I'm sure it's frustrating not to be invited.
Sandi