with regards to not wanting to overtake, I think it can come down to the way you present yourself. if you sit up the vehicles chuff in the overtaking zone then they will assume you want to overtake. if you sit well back and directly behind then they will realise you aren't itching to overtake. A lot of van drivers ride bikes remember!
filtering in slow or stationary traffic seems ok to me, but the habit I see in the UK of bikers 'filtering' (undertaking) at 70+mph, even in bad weather does annoy me enormously. It's mind bogglingly dangerous and how, when slipping through a gap barely wider than their bike, at high speed can those riders then expect cage drivers to give them the same room as a car at other times. the same applies at junctions. it really does hack me off when a biker overtakes me at a junction, then pulls in front of me to take up a car sized space. you wouldn't overtake someone in your car at a junction and then pull in front so why do it on a bike!!
just my two pennith of course, but then I am one of those that has to try and glue you back together again after it's all gone a bit wrong!!
1990 Landcruiser H60. Full rebuild completed 2014
2012 Hilux, mountain top and bedrug with GG AT2s