I'll add to further reasons why i assume Scum may want to war RBL...
Yesterday Scum had some ex Ginger join them, like RBL also had join them, so that put Scum upto rank 6 with 40 members however:
All left at the same time, which to me i find quite hard for 10 players to leave at the exact time, so maybe they are being account sat or it's just a coincidence, then after all leaving in the same minute, 9/10 of them joined RBL in the same minute
All these players, were Ex Ginger, recruited by SCUM which now are in RBL, tribehoppers much? Or maybe RBL poached a bit too far this time. RBL to me used to be one of my favourite tribe, a tribe at times i'd consider one of the elites amougst W37, i also assumed they would have a recruitment process, however to me it's all about points according to the stats, the past 3 weeks you have gained maybe 100-120 members, from multiple merges (FX, ~ATA~, -+DN+- and -NF-) each being the dominant tribe in there continant/continants, hence why you own so many K's, becoming maybe the biggest mass recruiting tribe in the top 20, R.L may have 280 members, but they gained those since the very start of the world, not in the past weeks.
So basicly due to tredding on scums toes, that's my opinion to why SCUM may consider going for RBL...