Not just overdoing it
It's not just that there are a lot of ads which slow page loading down (which they do)
It's not just that they're a colossal waste of bandwidth (which they are)
It's not just that they are loud and gaudy and ruin the experience (which they do)
It's that legitimate ones do creepy things like tracking you and your browsing habits, and that if an adserver gets compromised then the ads can shovel malware onto your system.
Ads aren't just annoying, they're downright dangerous. If that's not fixed then no argument against ad-blockers will ever hold any water with me. Why should I risk my own safety for the sake of your bottom line?