OP is a moron
Being able to save and load anyone's builds is a wonderful feature. It saddens me to see people getting so possessive over builds. There is no loving harm in what the guy is doing. In order for complaining about what you consider build stealing to be an intelligent concept, he would need to be going around publicizing the other person's builds and claiming it to be his own, or possibly taking a private build that he had been given trust to see and hosting it.
From another topic:
God dammit people, builds are meant to be shared with everyone. It does not matter that much who uses it. If you really want to be a reclusive whore with your builds, then keep to single player. I find the entire concept of a build getting "stolen" to be moronic. It isn't like piracy where you are losing money from people illegally downloading saves. It is just a save file. It is stuff like this that causes nice builds to become lost and forgotten. People should even post the bls saves if they think their build is nice enough to be enjoyed by the entire community.
It's interesting, because I usually judge people by what they complain about, and I find the ones who complain about save/load related things (save blockers, build stealing, etc) to be some of the stupidest complainers on the forum.
[inb4probablebackfire]
Good prediction, at least now you know better.