Especially if you add the screaming part. The trouble with chasing them away is that you have to be consistent about it. If you make them uncomfortable enough, they will stay away.
Personally I don't worry about what my neighbors think.
That sounds normal. Far too many people don't take the responsibility to keep their animals home. I still do not recommend feeding them or allowing them to hang around.
Guineas can be discouraged from being where they are not wanted by making them uncomfortable every time that they show up...