Maybe you should have walked up to him and ask if it was ok to cast for a while ?
I am sure he would have said ok ? Hell he does not own the ocean.
I under stand both sides

I hate when I am fishing on a open beach and someone stops and sets up next to me when their is miles of beach But then again I have fished side by side with 50 other guys at Wasque point and it's nothing less then a huge tangle.
Fishing is fun , correct?
And Larry beside me would be even better !
02 cents
VB