If you ask permission it is. If you don't ask permission then it is trespassing.
Trespassing falls under the Trespass to Property Act (TPA). It's an Ontario statute which carries a $65 fine including Victim Surcharge fine. A property owner can in theory arrest you.
Nobody knows for sure. We have over 8,000 archived on this website. As people without families pass away, those houses may also become open to exploring.
In my experience, the answer is NO! Abandoned places are used as propaganda by some ghost hunters.
If you don't break in and don't steal items you are committing no crime. If you take items with you then it is considered a break and enter even if you didn't force entry.
You really don't. But signs to look for include overgrown grass, holes in the roof, broken windows, missing hydro meter, tire tracks in the driveway, cobwebs in the windows.
They can be. Some buildings may have homeless people inside or drug users. Floors can be weak or slippery. Sharp glass may cut you. There may be guard dogs.
Not in the two decades that I've been doing this.
Yes we are 100% free.