Drift isn't inevitable - it just needs the iron fist of a set of moderators to delete or move all drifting posts - but in reality, who has time for that?
In most cases the questions are usually answered very early on.
As an aside, there was a post on Facebook about towing a Landrover discovery that had failed. The question was answered by the first respondent, refuted by the second which caused a 3rd post by the OP who was confused. I replied confirming that you can and gave a link to the relevant manual and page number and the limitations.
Several hours later, people were still posting conflicting views!