U-Bolts: To re-use or not?

I want to hear some opinions on this. I get the concept of why it (may) not be a good idea to, but at the same time im curious to see what you guys think. Also if thread locker or double nutting it plays any part?

In my particular case, there's a very good chance that the bolts im taking off (swapping springs) have been on since the factory.