Um no. It's not a blanket ok for rural areas, Just some roads in rural areas, and only where local governments have expressly permitted it. Details at http://www.mto.gov.on.ca/english/dandv/orv.shtml
LOL...I can go to my home town (rural area of Ontario) and I can ride an ATV. If you really want to get into semantics "just because" than you should probably mention that you need a license as well. You forgot that part!
I do get where people find it fun to play with you though. You make it so easy.
Cheers
Paul