Looks like a good idea to me - especially for student pilots seeking to learn from those more experienced.
I think the way around the ANO is for people who are happy to take someone flying simply to say that and the generic types of flight that they typically do (inc. broad location). Then no details of any specific flight are being published. Probably best avoid online discussions about costs. That can be raised between the individuals concerned.
It's borderline, but then that's how the law works.
HH