[jmount]

"When you fork a repository on GitHub, we create a shallow copy of it. This copy has no objects of its own, but it has access to all the objects of an alternate ..."

So does this mean one could attach a GitHub repository by having a lot of shill accounts cline it and add random objects (possibly having a performance impact on the original)? I understand the engineering need for the use of alternates, but wonder about the lowered degree of isolation.