In my eyes this is subject of one's individual sense of loyalty. But when bigger picture is considered, Steem is meant to be the an ultimately democratic platform, where you can upvote whatever you want, write whatever you want and downvote whatever you want. Thus telling people what they should and shouldn't write is not exactly in line with these assumptions.
Also note that you are allowed to spend your dollars made on Steem on whatever you want including guns, hookers and all, and although I understand that the very post is trying to raise money for some external cause and has no other value, no one can force anyone to upvote or downvote it if they don't find it meaningful or harmful.
But of course, you can campaign against it like you just did - that is also your sacred right. But if Steem decided to ban this by definition, started removing or blocking posts like that, or having official committees deciding what goes and what doesn't, I would be very alarmed, even if the causes happened to be completely unrelated, for example some babe getting a new botox implant ;) And I do get that you are not advocating for that, not to mention that it is by definition impossible to censor stuff here, at least theoretically.
Still, Steem has to pull its weight through all the freedom it introduces - that would be my closing line on this one.