I’ll defend it. URLs rather than URL’s, certainly. But either Earls or Earl’s works, the first as “this is a link to several odd people named Earl”, the second as “a link to the various strange sites belonging to Earl”. It’s a bit like calling the nutjob parts of the 'net Weird Earl’s World. Perhaps lacking in hilarity, but not clearly wrong.
I’ll not only defend ‘Earl’s’, I’ll argue against ‘Earls’.
‘Weird Earls’ doesn’t have much of a ring. ‘Why is there a section about strange noblemen here?’
Weird Earl’s however sounds like a discount store. ‘Weird Earl’s House of Discount Websites! All domains must go! 1/2 (of the IQ points) off!’ It sounds like the kind of place you’d expect to find things like ‘Walter Miller’s pitifull story’.
Although a site featuring men whose ears you can see through and appear to have swallowed a ballcock would fit rather nicely. It would seem that that is what it would take to get this thread fired up. Oh well…
As others have indicated, if it were “URL” instead of “Earl,” then it wouldn’t be right to have the apostrophe. However, it’s a play on words. “Weird Earl’s” is made to sound like a place – the fact that it sounds like “URLs” is a joke. If it was called “Weird Ed’s” instead, would you be complaining about the apostrophe? No.
That’s great, but we’re not talking about a plural. We’re talking about a possessive. For example, we have a restaurant in town called “Cecil’s.” It is not “Cecils” because there is only one Cecil (at least only one who owns/owned the restaurant), and it is his restaurant. That is the same idea with “Weird Earl’s” – view it as a place, not several weird people named Earl.
I understand that, but it’s not clear when you read the phrase. I think most people would probably assume plural given that what it really is is a collection of weird urls.