[Snarf]

I can tell you for A FACT that every league I have played in had the requirement of every TEAM MEMBER signing up on the league page.

You can edit the quotes, also more fallacies you just lost a brain cell(see I can be cool too). You also play nothing but small time leagues with unprofessional admins who don't know what they're doing.
And this is the reason this is so ridiculous copy paste they didn't need to sign up for your forums just to post a roster when you can do it via a pm all in the OP.(though you apparently don't know how to use the edit button so I wouldn't put it past you.)
You are hosting a small time league they shouldn't have to post a full roster, join your stupid community and talk to them just so you can avoid the horror that is copy paste.
If this were a big time league I would expect:
1. signup on the website
2. Post a full roster including steamids
3. Setup a match date.
All of which could have been done through pm anyways so you are just being lazy.