A simple warning if your going to be longer than usual on the runway should avoid any chastising. The runway isn't a sightseeing attraction. Get off there as quick as you can, wherever you fly.
Yes but it's preferable to vacant via a taxiway rather than go off the end at 20/30 kts just to keep others happy. Do I believe in minimum runway occupancy - yes of course! But it's just a fact of life that even at the best organised airports there's going to be the occasional go-around because the runway is still occupied. You should try landing something like a B738 on a wet limiting runway even with all the autobrake and reverse thrust and you will know what I mean. Also big brother is watching us - there are maximum limits for taxiing/vacating depending on the geometry of the runway/taxiways and if we exceed them it might be tea and biscuits with the Chief Pilot. We do try our best. Finally, yes as a pilot it makes me cringe when I hear some of my professional colleagues berating ATC as to why they are number 2 etc. It's all part of life's rich tapestry!