I haven't seen an ad since my early 20's when I trained myself not to. Even in the most challenging environment (eg. cinemas) I have the capacity now to entirely avoid them. Despite that I've never had the slightest problem finding everything I need. No ad has ever done anything for me other than to annoy and fight for attention with things of genuine value.

I use an ad blocker now less to prevent ads appearing (which unless they pop over or flash or animate I would barely notice), than to keep data usage down (I'm in a rural area with extremely expensive data).