One question that has paticuarly caught my eye is Using multiple laptop battery packs to power everything. It seems more like about batteries than Arduino. The OP doesn't even mention if he's using an Arduino, just that he's building a robot and his question was rejected on EE.
Although the OP never mentioned it is using Arduino, he probably is to post it here. Still, why would it be acceptable to make it on topic by saying it's for an Arduino project? On SO you can't ask about an Excel spreadsheet if you say "it's my budget for buying hardware so I can code."
This is not to decide the future of that post, it is to make a clear policy of when an electronics question should be closed. This is an essential part of our scope and I feel like we need to get this clarified before moving on to more important issues. What should we do?