I was just thinking about how people linking to a indexu site listing will have to react when there are slight changes to that listings

For example, say a person wants to put a link on their website to a listing in a indexu site, so they goto the site, find the listing, grab the url and then put the link on their website, lets say thats fine for 3 months, but then the link owner then changes their listing name.... wont that then mean anyone who has linked to that listing will now have a outdated url which they are linking too....

Surely that cant be too good for search engine rankings (or in my view cant be a good look for average people wanting information, clicking a link thinking they will be getting information, and then not getting any)

So im wondering is there a need, to have a perma-link system where no matter what the SEO URL is... we can give people a url which will never change for that listing (maybe based on link ID)

Looking forward to your thoughts.....
Cheers Ezy