These are rather silly posts, not something that should be supported or applauded.
A few points here, firstly, the dig about half and half scarfs is a huge sweeping generalisation and completely inaccurate. To quote one of
@Damocles favourite videos "It's ok to not like things". It doesn't make people who think the booing is stupid, a plastic half and half scarf selfie taking lunatic. I think the booing is stupid, small time and petty, but i'd also gladly set fire to any half and half scarf I see or selfie taking moron for that matter. Labelling people who don't like the booing in that category is wrong and shouldn't be used to support your opinion.
Onto the root cause of this. We all know and agree UEFA is the rectum of European Football. A loathsome, corrupt organisation that any true football fan will not have a single second of time for. We are all together in this view. The examples you used, are indicative of the conduct we all hate yet sadly, expect from them.
Now, does us booing the CL anthem change any of that, or have any affect whatsoever on the conduct of that organisation. No. To feel it does is impressively deluded.
Platini walks into work one day, thinks, you know what, City fans booed our anthem last night. We should publicly apologise to them, reimburse their fans, refund the clubs fines and ensure none of our stupid behavior continues ever again. Can you imagine a world where that would ever happen? No, so why bother?
It's not a case of sweeping it under the rug, it's case of taking the high road and not lowering ourselves to that level. I remember someone asking Txiki during a Q&A why we don't respond to jibes from UEFA, Mourinho etc and he said "because some people have their behavior, and we have ours". That sums it up for me. Rise above it, be better than them.
I don't expect fans to cheer it, that would be weird, but booing it makes us look small time, petty and given our performances in the competition, it looks sour grapes. There is absolutely nothing good coming out of us booing it. So why bother?
It's hardly sending shockwaves of change throughout UEFA, and it never will. Nor does it need to, because one day we'll win it, and I for one won't give a fuck about UEFA.