It occurs to me that a malicious program could set up thousands of links to dummy pages on a website:
www.mysite.com/dynamicpage/dummy123
www.mysite.com/dynamicpage/dummy456
etc..
How is this normally handled? Does a developer have to look at all the parameters to see if they are valid and if not, automatically create a 301 redirect or 404 not found? This requires a table lookup of acceptable url parameters for all new visitors.
I was thinking that bad url names would be rare so it would be ok to just stop the program with a message, until I realized someone could intentionally set up links to non existent pages on a site.