Can I use high ranking sites to push my competitors out of the first page of search results?

[Zippy-Bungle]

I'm looking at a bunch of long tail low traffic keywords that aren't difficult to rank for. As I was idly doing a boring task my mind wandered and I thought....

Why don't I ask lots of questions about these keywords on sites such as Moz, Quora, Reddit etc where the high DA will get them to rank for the search term?  The results on a SEO site or Q&A site won't be relevant and so I'd starve my competitors of some of their leads.

Of course I'm not sure the effort would be worth it but would it work? (and no, none of my long tail keywords are included in this post)

[DennisSeymour]

Definitely possible. It used to be much easier. You can rank for 5 pages, all your stuff LOL. good old days

Anyway, try to look at the social pages/forums, etc already ranking there where you can put your content. Those are great signals that tell you that you can create content on those and rank those pages (link to them to make the % higher)

If high trust domains like what you mentioned aren't ranking there, you need to test it. And if you said that the keywords are easy enough, then your chances for those to show up is really good.