I love the site and all of the features. I do however have one concern, that is regarding the safety of the users/builders.
I believe it's just a matter of time before someone gets killed or seriously hurt by attempting some of the instructions. I've seen way too many instructions without any type of warning text or concern about user safety, these instructables often involving high voltage, significant overheating risks and high powered lasers. A couple of these have also been featured instructables.
My suggestion is something like big red bar just above every page of the instructable, saying like "DO NOT ATTEMPT THIS PROJECT WITHOUT ADEQUATE KNOWLEDGE/EXPERIENCE". To make this bar show up I suggest one final pop up question before each project is published saying something like "Could building/using project possibly cause any risk of injury?" and if true the banner would appear. Admins should also be able to turn on this bar manually.
I believe the current focus is to prevent project that intends to cause harm, but many other projects will likely cause harm if the builder doesn't have enough knowledge. Especially if the original maker himself also lacks knowledge about the risks with their design. I would ask you to consider not allowing instructables that involves tampering with high voltage connections if you don't like the idea of a warning banner.
I don't want to see some kid loosing their eyes after attempting to build a DIY laser engraver or worse, killed during a rainstorm holding their ungrounded DIY high voltage spotlight.