I would really like to have that demonstrated to me. My telephone cares little which way I point it.
Your telephone is not an antenna on a cell system. I could have been more explicit by saying "the antenna on a cell system tower", but I assumed most people would know what I was talking about when I referred to plural antennas.
You cell phone is half the connection, and while it is approximately omnidirectional, the antennas at the other, higher power transmitter end, are not.
Maybe the donut is flattened on one axis, but we all know that there aren't tens of thousands of antenna on the tower, each one mounted on independent gimbals, tracking each user.
You missed the critical word "phased". Please refer to here, here, or here for more info. Suffice to say, your hyperbole that one would need tens of thousands of antennas on gimbals to provide directional access to multiple users is quite hilarious.
Your low powered transmitter on your handheld device is not going to be a source of interference to anyone. First, it's low powered. Second, it transmits on the handset side of the frequencies, so even of you are standing next to another cell phone it won't be received by that phone, which is receiving on the tower frequencies. Third, a major design criterion of the cell system is the reuse of frequencies and the allocation of a specific set to cover a certain area. If a StingRay comes to town, it will use a different set of frequencies. It isn't trying to overpower another cell on the same frequencies, it is using its own set at higher power. The phones preferentially connect to the higher power signal. Why? Because it is more likely they can use lower power to communicate and thus save battery life.