I have had them this year for the first time ever- they are destructive especially on new rosebush growth.
I did read that if you catch them, to put them in a pail of suds and water, which serves to 1. Kill them, 2. Give off a bad smell to repel others. I have this nasty bug brew near my rosebush for 2 weeks now, and since I did that, their numbers have dwindled. With that said, find another couple daily. They're a nuisance, and destructive.
For the record, I have caught at least a couple hundred, and haven't been bitten by one, either- whew!