Facebook adds 5 divs, 9 spans and 30 CSS classes to every post in the timeline

Anyone who has written a few scrappers knows how brutally ineffective this is. Yelp tried to pull the same thing and it took me about 3 minutes to rectify my "for fun" scraper. It's also really not that difficult to write a smart scraper that you say, "Look for these things in this post. However you find them, replicate it for the others". Which is ultimately what I made my Yelp scraper do.

If there's a pattern, I will find it, and I will exploit it. <3

Yep, seems like a total waste of time. The people scraping will spend the necessary time to get around this (and then distribute that knowledge to the masses) so it seems like a pointless arms race. Facebook employees could better use their time on developing actual features that bring value.

How is this waste of time / pointless ? They do bring value for fb, they reduce the loss of ad money.

Because they are fighting the people that absolutely do not want to see advertisements whatsoever (most normal people I know do not have ad-blockers), which already makes them the least likely to be attracted by advertisements. If anything, those brands are souring their reputation anytime they are seen by those kind of people in a medium that those consumers find obnoxious.

You can make a similar argument that the RIAA/MPAA going after piracy is a waste of time. Again, focus on delivering value to actual customers.

If Facebook spent more time on making a friendly ecosystem / community I would be more open to signing back up again. Instead, it seems they are hyper-focused on advertisements at the expense of everything else.