I have no problem in folks getting up close and personal with critters to educate themselves, but the a-hole referred to by Arey is just that. I, and others, know of him, and he has a habit of doing show-off stuff. He has a rep. The folks running the Hawk Watch should have reported him, hopefully they did. Personally, I let critters be and never pick them up. Leaving our scent on them, especially young ones is most likely the kiss of death for them, reps excluded. I do make an exception for birds that strike our house windows. If they are stunned I cover them with a basket to give them time to recover. Usually there is a blue jay hanging around to make an easy meal of it, the basket protects them from that and gives them some time to recover, or pass on peacefully.
This is what was posted on the birding list, at his Flickr link he has quite a few rattler photo's.
"Non-bird related, I caught the most gorgeous Northern Watersnake I've ever seen
along the trails in the State Park and a HUGE Black Rat Snake at Bunker Pond,
easily 6 ft. Some of the patrons at the hawkwatch were able to see through
their scopes and bins me wearing the rat snake around my neck as I posed for a
sweet photo before safely releasing it.
Photos of the day can be seen here :
https://www.flickr.com/photos/larrybird13/"