Yeah, don't think I will do that, as could see how that would easily backfire. Go ask for some form of benefits and convince them I've been in Canada this whole time, and their response would be something like, "Ok, here's your $3000 in benefits, plus $280,000 tax bill for the last 10 years.". I think they can only come after you for back taxes for 10 years, right. In that case, I'm basically in the clear, as last time I resided in Canada was 2008 for one year, and I got a passport with overstay entries to prove it!
Besides, I don't need or want any benefits anyway. Maybe in 15 years or so when they figure out how to regenerate optic nerves, but not now. Hell, II'm staying at a #800k house rent free, so can't complain.