I take photos, I object. Moot point.
You can claim fair use by using photos posted on the forum somewhere else within the forum. But if you take those photos off the forum and use them on some other medium, you’re now crossing a line that is no longer covered under fair use.
The ToS is a legal document and there isn’t room for, ‘most people wouldn’t mind’. Consent is legally required to take a photo from one medium and use it elsewhere.
You also have a problem of asserting that the user who posted the photo is even the legal rights holder to that content. I could post something I bought from the pro photographers at a 24 hour race. The license on the photo is for my personal use only, it doesn’t allow a third party to take that photo and use it in some marketing material.
I feel it’s rather lazy and unprofessional to say it’s too difficult to contact a few people and ask for consent on their photos. Yes, most people would have no problems and would be happy to have their photos used. You can probably even get long term consent on future photos from the people who contribute the most here - people like Alain, Mark, Lauren. But that doesn’t mean it’s a yes for every single person and making that assumption can get people into legal trouble, and at the very least is an act in bad faith.
How often is the need to snag photos from the forum really going to happen? I can’t see it happening so much that asking for consent is a huge barrier. Create a business workflow and I’m sure there’s a way to utilize our technology to make it less painful.