UO Second Age

What happens if you revive a ghost in a stranger's house? Does the ghost stay on that tile or get ejected to the outside?

Ghost and reviver are both strangers of the house.

I hear someone can revive a ghost on a tile that a table is on (or similar blocking object) that the owner released then re-lockeddown. Thus allowing the ghost to stay on that tile until someone comes by and revives the ghost then allowing that revived person to loot whatever is in the back of the house.

Not diagonal tables. Straight ones in a line.

If you res a ghost in the house they will res and remain where they are resed, but if they log in in a house they are not friended to, dead or alive, they will be placed outside.

No, you cannot res a ghost in a location that is blocked by a blocking item such as a table, or by a trashcan. Diagonal is the only way this can be used to break in.