Yes, and the longer you fish, the more you're likely to see that type of thing. IMO, too many in our society today feel everything they do is only about them.
I've had others walk right out into a stream in front of where I was wading, and into an area in which I was casting & almost wade into my fly line.
It seems that the more folks who use our natural resources, the more there are who lack any type of sense of etiquette or manners.
On another site I frequent, where a majority of the members are saltwater surf anglers,(fly & other tackle) there is a similar discussion going on, where some folks seem to believe they have a right to a specific spot, even when it's already occupied by another angler. Even to the point of resulting in physical altercations.
Similar discussions come up on a bass fishing site I frequent too, where boaters move in on other boaters while they're fishing, or boaters move in on shore anglers, sometimes even close enough to tangle their lines or motor prop in the lines of the shore anglers.
It's a universal problem apparently.