What happens if I create and ping a really big number of shorten URLs with various URL shortners (and their useful APIs) all pointing to the same URL? (In this case all the URLs created would be 301 redirects.) So summing everything up: URL shortner 1 -> 100 "301 redirect" links -> website URL shortner 2 -> same thing (...) URL shortner 14 -> old same thing In theory wouldn't this bring down someone's SERP? I didn't try this or tested it because I don't like negative SEO - it doesn?t make sense bringing everyone else down if your own website lacks strength because you invested your effort in other places (and also because if you do it Santa won't bring you any gifts!). However this is a very nice conversation topic. Tell me your thoughts - trolling is allowed!