The issue is that this board is a privately owned board. The members are subject to the TOS which so indicates a proper use of the English language. Morever, there is no need to police the board if the members simply took heed of the greater good and posted responsibly.
The Canadian government offers network connection as a perk during breaks and before and after hours (overtime etc.) Employees are free to surf as long as their work is completed on time and as long as the surfing does not infringe on the work environment (i.e., cutting into bandwidth usage to a great degree via streaming content). At schools, browsing is certainly permitted, at least in Canada, during class-time as well as recess, lunch and after school. In highschool this would work as well with spares and inbetween classes. There is no logical reason to conclude that because someone is at work or at school that they should or should not be surfing the net. Take Tuberoller's work environment, firefighters are often at the hall for a period of 24 hours or greater. Sleeping over, watching tv, or now surfing the web. This is perfectly permitted and moreover PROVIDED by the employer. I think of security guards at my work who are in teams of 16 at the front. At any given time 8 of them need to be looking at the monitors, the other 8 may read, watch tv, surf etc, every 30 minutes they switch.
If a child is doing a project on headphones, I would conclude that Head-fi would be a prime candidate for information if only as a jumping board to more scientific resources. This child will not be able to see Head-fi. It was a perfectly legit use of the net, not even recreational.
Your logic Sovkiller is narrowminded at best. It may be your experience but it certainly is not the norm. Additionally, the use of filters is to avoid content which is inappropriate for the work place not because surfing the net is forbidden.
Now I see that ampgalore has so eloquently tried to circumvent even modest suggestions and directly violate the terms....just lovely. Gloco you are right, it will be nearly impossible to police the entire board all the time, but banning a bunch of perps is not out of the question if it had to come to that. Sadly I sure wish it didn't ever have to go that far. The TOS are certainly non-negotiable nor are they required, if one does not wish to abide they don't have to agree and can choose to lurk and never post.