Good suggestion. In the area where I have less support (half my run has 4' tall chain link, so I added 7' U-posts around the perimeter to support the netting) I ran tension wire from post to post to create a perimeter for the netting to rest on. Helps provide the posts a little extra support...
You need far stronger supports to prevent collapse, though you'll still see sagging regardless as the snow builds up. We got a "worst in 50 years" snow storm last year and it built up 6-8 inches (15-20 cm) on the netting at a time, so we'd go out and hit it with a broom every 4 hrs or so to...