For this to be constructive, there needs to be some examples and a little bit of fingerpointing, because I'm pretty sure no one here considers themselves to be undermining other avenues of approach. Granted, most of us are incapable of it due to not even being in the faction, but still.
you can undermine people's rp without being in the same faction.
all you have to do is constantly post on forums about how "x faction rp is dead.", even when other people who play that faction are present.
If the loudest voices say "x faction is dead", then passers-by won't see the people who are playing x faction. Which undermines those peoples efforts.
if you have 1 person doing x faction rp, and 5 people happen by that might be interested in x faction rp, and there's 1 or more people loudly going "x faction rp is dead", then chances are, those 5 aren't going to see the 1 person that is doing x faction rp, and so those 5 people are likely to look elsewhere.
So instead of 6 people doing x faction rp, there's 1, and about 3 loudly posting on forums about how x faction rp is dead.
but whatever. it seems people would rather stop other people having fun, than to help others to have fun. So, enjoy, i guess, vOv.