Yeah...I have no experience, (if you don't count the past couple of decades, from Cali to Texas, and a few points in between) and I am always blowing smoke up someone's ass. But since your methods work for you, "you go girl". :thumbsup:

As with most things in life...if there is an issue, correct it. If there is no issue, likely there's no need to correct it. But isn't corecting a non-existant problem a tad anal?

I do find it intriguing that everyone in your region mishandles their bags of potting mixes to the point that the end user is needing to correct an infection or invasion. My guess it's not the region, but more likely the gardener. Both the nursery and the commercial potting mix companies would go out of business with business practices like that.

Most commercial mixes are fine, and are usually free from weeds and bugs. REGARDLESS OF REGION.