OH do I feel called out by today’s daf! If you, like me, often don’t say anything when someone does something that makes you uncomfortable. If you don’t draw the line right away, and then the line get’s SO violated it’s far in the distance – get ready for the daf.
Rav Naḥman says: If one acquired the privilege to place thin beams on his neighbor’s wall, i.e., if one had used the wall in that manner in the past and the owner did not protest, so the one using it can maintain that he had acquired from the owner the right to do so, he has not acquired the privilege to place thick beams there. But if he acquired the privilege to place thick beams on the wall, he has acquired the privilege to place thin beams there. Rav Yosef says: If he acquired the privilege to place thin beams, he also has acquired the privilege to place thick beams. There are those who say that Rav Naḥman says: If one acquired the privilege to place thin beams on his neighbor’s wall, he has acquired the privilege to place thick beams there; and if he acquired the privilege to place thick beams, he has acquired the privilege to place thin beams.
Yep. You have property and your neighbor puts things on it. Do you want them to? Maybe not. But, you figure, it’s no big deal, just a little light thing. But then your neighbor thinks – oh, I am free to use this however I want! And placed big heavy beams. Well, now you don’t get to complain! You should have said something from the beginning.
Another example
Rav Naḥman says: If one acquired the privilege to let water drip from his roof into his neighbor’s courtyard, he has acquired the privilege to let the water pour there through a drainpipe.
What!!! Can you imagine? So, a little run off from the neighbors roof comes into your yard. Do you like it? No, but it’s not a big deal . . . until they build a drainage pipe that pours water into your yard causing a muddy mess.
More examples are given including your neighbor hanging items from your wall or using your wall to prop up their Sukkah (once you say nothing on day 8, you have tacitly given them the right to keep it up all year!).
The message? Say something.
Have I learned it? Nope.

