Aye, Leeds are a strange one as it's a great away day but as you rightly mention they're a horrible fun of fans. Themselves, Newcastle and Villa are amoebas.Although I`m happy for Leeds to remain forever in limbo, due to the horrible EDL, Stone Island clad boneheads who support them.
If I remember correctly it was 1987 (or '86) when Liverpool played Oxford and Leeds, who weren't playing that day if I remember correctly, came over for a scrap.
Anyway, they soon regretted it as they - and the RS - got a good hiding on Arkles Lane / Priory Road.