What are you even talking about at this point?
You've started with complaining how someone gave you advice on samurai and flipped out over that and now you're trying to convince us that... I'm unsure - that advice should only be given to certain classes?
(Also... someone coverd the summoner-part already, but let me just say: neither bard nor maschinst are "single target ranged" - both have suitable AoE and they're perfectly fine with dps on masspulls)
As a maintank I'd also like to comment, that yes, it is indeed important to keep an eye out on wether or not a group can handle masspulls. Wether or not!
Just making it standard to go slow and to pull only one group at a time, isnt a good solution either - each tank can hold aggro on 10 mobs as easy as on 3. No reason not to masspull if your group can handle it - your post sounds a lot like as if you're flat out refusing to do masspulls.
However if this last segment was somehow related to that paladin who tried to be helpful (aka: he masspulled and your group wiped because you didnt contribute enough dps), let me just say: If someone whos got their job at level 70 doesnt know how to play it and how to handle single target vs. masspulls, I have little understanding for them.
By now my best guess is that you didnt use your AoEs while the paladin tried to do big pulls, so they asked you to use your AoE...
While I dont believe you're trolling here, you can easly come off as one - even by your own definition. You might not have noticed it, but you've touched on a somewhat sensitive subject with your whole "Dont give advice" - "Let me play how I want!" - "Its my sub, not yours!" - "I'm only here for fun!"-subject, because this attitude is something thats pissing people off. And for good reasons - its rude and selfish to behave this way in any form of group-content.
So a troll could easly figure "Hey, if I want to trigger some people, a post like this will do!"