This question currently has 3 flags against it for "primarily opinion based". If you read it, and its edit history, at no point was it opinion based. It is quite clearly asking whether VSTs could contain malicious code (a question with an objective answer: yes) and whether there's a risk of installing them without checking them for malicious behaviour (another objective part to the question).
While it wasn't worded perfectly, it is still readable. We should be forgiving of this - the author's native language is probably not English. If you don't think a question is worded clearly, but you understand the intent, edit the question to make it clearer, or request clarification in a comment. Being pedantic and jumping to a close vote helps nobody. Remember that you can't retract a close vote, but you can retract something said in a comment.
I've seen this kind of behaviour becoming a trend recently and I'd like it to stop. It's lazy, and makes the site a toxic environment for newbies who I would like to encourage to stick around. Take the time to guide new people who haven't followed the "StackExchange way" of doing things, and you'll probably find that their next questions bring some useful content.
I welcome any opinions on the matter.