Do beetles in south Florida bite?

It depends on the species. But if it has pincers (pinching mouthparts) or a stinger, i don't think you wanna pick it up. If there's more you want to know, here's a site that'll help:

http://www.insectidentification.org/insects-by-state.asp?thisState=Florida

if you scroll to the bottom of the site page, you can sort out what kind of bug you're looking for.