I don't see how exchanging this information is illegal. There isn't a guideline specifically stating what's prohibited and isn't, but traditionally mods don't allow the promotion illegal activities which bypassing a filter could be considered.
Reasons why you shouldn't:
1) Not your system to modify
2) The filters are inplace for a reason
3) Gaining access to something you're not suppose to have (This could be considered hacking / cracking which is illegal)
4) You're not at school to surf the web, you're there to learn
Reasons why you shouldn't:
1) Not your system to modify
2) The filters are inplace for a reason
3) Gaining access to something you're not suppose to have (This could be considered hacking / cracking which is illegal)
4) You're not at school to surf the web, you're there to learn