yes - football twitter doesn't seem to have moved across yet. i've reached the stage where i look at it maybe once a week now.
no such thing.
and have you posted #proofofcat to verify your account yet?
i have thought about doing similar and splitting it for different directions - although don't think having one account for multiple interests ever caused issues on tweeter.
i have gained a heck of a lot of followers in the last couple of days, and no idea who most of them are - think they are people who follow someone i've followed / responded to. if i follow them all back, it's going to get unmanageable. but i can see having multiple accounts getting complicated as well.
having said that, the only argument i've ever got in to on tweeter was about a historical aspect of one underground station (think it was euston) - it was the sort of post where someone posted an old photo, someone added some info, someone added some more info, i added something and the previous person had a hissy fit about unqualified me responding to their expert opinion...