1) Bon-Bon: Infamous? Like… bad? I don’t think so.

2) Afraid? Afraid?! I ain’t scared for [omitted]! But I’ve seen it happening and I-…

I don’t… I don’t know…

3) Ah yes; self-defense applications. Amplification to boost muscle mass and manipulation to shield your body from the adverse effects.

There is a certain level of control required, but you’d start to feel pain if you pushed yourself beyond what you’re capable of. If that’s not a good incentive to stop, it’s hard to maintain a spell when your concentration is compromised.

As for casting it on somepony else, yes it’s possible. And I imagine the results could be fairly gruesome. But amplification spells become weaker the further away they’re projected. Substantially weaker. You’d pretty much have to be touching the subject for about a full second for it to even start taking effect. For that matter, amplification spells would be considered a lot more expensive than most other options. It’s just not terribly efficient.

I’ll get to the lyre part later.

4) Bon-Bon: I’ve seen that one too! I like what he does! Just the act of going around and fixing fraudulent or inept work is fantastic!

Bon-Bon: Hey! Have you heard about this new show that’s starting soon? It’s called Renovation Raiders. They do huge renovations, like the ones that take a few days or more, but they do it in only a few hours while the homeowner is out. I can’t wait!

5) Unless you plan to give copies of those books away, that doesn’t amount to anything. Knowledge you possess doesn’t help anypony else.

And while I’m sure you were only joking, a spell like that would require knowledge of the subject’s presence. B is effectively invisible to scrying, even to seers. You’ve never even met.

B: Well… He’s never been aware of it.