Birders

... what ever you do, Federal law is very specific: you are not allowed to molest migratory birds or their nests in any way. They are very serious about this. Ohio state laws are as specific. An Ohio Wildlife officer will be glad to hold for the police to come out and handcuff and take to jail anyone they catch at it.

I found this out in Texas a few years ago when a handyman tried to destroy a nest of Cardinal nestlings on our back porch and I called the Dept of Wildlife and we had a cop come out here to explain this to him.

A couple of weeks, they'll stop bothering you, and in a month they'll be gone. Blue Jays are aggressive, but maybe an umbrella might work. If you're too close to the nest, if you can find another place to sit as far as you can from the nest.

Not the best answer, especially because there are few birds as territorial or as aggressive as a Blue Jay.