I can see many reasons for not wanting to sign hardy, being a jag is not one of them.
Hardy is an elite pass rusher and there really is no question about that
The question is does the risk outweigh the reward, and I don't think so
Hardy farts on the field and he is gone and while he's not going to get market value for his talent with the baggage, he is going to get good money
Hardy is s very talented player but unless you could sign him to something like a week to week check I just don't think he is worth the risk