[1.0] Boarded ships "repaired" by placing blocks and undoing - Exploit?

[TacticalMaster]

So, here's a potential exploit I'd like to report: You can "repair" a boarded ship by just placing blocks of any sizes and undo them. It will then restore that ship to its original value and thus can be sold at scrapyards at the original price.

 

Is this intended? Because this speaks of easy money.

 

And if it's not, I suggest adding building restrictions on boarded ships, such as converting blocks only, until it is properly repaired at a Repair Dock or through Builder Mode.