My son would be 30 today if I hadnt lost him in a car accident. I have never been to the site. I know where it is and avoid it. I don’t know if any of his friends did one of these memorials but they are common here. If they help someone with healing or closure or whatever then maybe that’s OK. Personally I think they’re tacky.
This is why I’d think a good “compromise” would be a 90 day display.